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		<h1>ĐỀ THI THỬ TỐT NGHIỆP THPT  MÔN SINH HỌC</h1>
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			Câu 81: Đối với các loài thực vật ở cạn, nước và các ion khoáng được hấp thụ chủ yếu qua bộ phận nào sau đây?<br />   A. toàn bộ bề mặt cơ thể.		B. lông hút của rễ. 		C. chóp rễ.		D. khí khổng
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			<td style="width:11.0cm; padding:0cm 0cm 0cm 0cm; height:58.8pt" valign="top" width="416"><span style="font-size:11pt"><span style="line-height:13.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:12.0pt">ĐỀ THI THỬ TỐT NGHIỆP THPT&nbsp; NĂM 2020</span></b></span></span></span><br  />
			<span style="font-size:11pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:12.0pt">Bài thi: KHOA HỌC TỰ NHIÊN</span></b></span></span></span><br  />
			<span style="font-size:11pt"><span style="line-height:13.7pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:12.0pt">Môn thi thành phần: SINH HỌC</span></b></span></span></span><br  />
			<span style="font-size:11pt"><span style="line-height:13.7pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><i><span style="font-size:12.0pt">Thời gian làm bài: 50 phút, không kể thời gian phát đề</span></i></span></span></span></td>
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<span style="font-size:11pt"><span style="line-height:normal"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:12.0pt">Họ, tên thí sinh: </span></b><span style="font-size:12.0pt">........................................................................</span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>Số báo danh: </b>.............................................................................</span></span><br  />
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<span style="font-size:14pt"><span style="tab-stops:1.0cm 155.95pt 262.25pt 382.75pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 81: </span></span></b><span lang="DE" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Đối với các loài thực vật ở cạn, nước</span></span><span lang="VI" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> và các ion khoáng</span></span><span lang="DE" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> được hấp thụ chủ yếu qua bộ phận nào sau đây?</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="DE" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; &nbsp;<b>A.</b> toàn bộ bề mặt cơ thể.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">B.</span></b><span style="color:red"> lông hút của rễ.</span> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C.</b> chóp rễ.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D.</b> khí khổng</span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 82: </span></b><span lang="IT" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Trao đổi khí trực tiếp qua bề mặt cơ thể là hình thức hô hấp của</span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:10.0pt 135.0pt 260.0pt 385.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; <b>A. </b></span></span><span lang="IT" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">châu chấu.</span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B. </b></span></span><span lang="IT" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">cua.</span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">C. </span></b></span></span><span lang="IT" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">giun đất.</span></span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D. </b></span></span><span lang="IT" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Chim.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 83: </span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Nuclêôtit nào sau đây <b>không </b>tham gia cấu tạo nên ARN?</span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:163.3pt 284.8pt 406.3pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; A.</span></span></b> <span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Ađênin.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> Xitôzin.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C.</b> Guanin.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">D. </span></b><span style="color:red">Timin.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 84: &nbsp;</span></span></span></b><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="letter-spacing:-.45pt">Loạ</span></span></span></span><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">i <span style="letter-spacing:-.4pt">độ</span>t <span style="letter-spacing:-.35pt">b</span><span style="letter-spacing:-.45pt">iế</span>n <span style="letter-spacing:-.4pt">nà</span>o <span style="letter-spacing:-.35pt">s</span><span style="letter-spacing:-.45pt">a</span>u <span style="letter-spacing:-.4pt">đâ</span>y <span style="letter-spacing:-.4pt">thư</span><span style="letter-spacing:-.35pt">ờ</span><span style="letter-spacing:-.4pt">n</span>g <span style="letter-spacing:-.4pt">khôn</span>g <span style="letter-spacing:-.4pt">là</span>m <span style="letter-spacing:-.4pt">t</span><span style="letter-spacing:-.35pt">h</span><span style="letter-spacing:-.4pt">a</span>y <span style="letter-spacing:-.4pt">đổ</span>i <span style="letter-spacing:-.4pt">s</span>ố <span style="letter-spacing:-.45pt">l</span><span style="letter-spacing:-.4pt">ư</span><span style="letter-spacing:-.35pt">ợn</span>g <span style="letter-spacing:-.4pt">v</span>à <span style="letter-spacing:-.4pt">thàn</span>h <span style="letter-spacing:-.4pt">p</span><span style="letter-spacing:-.35pt">h</span><span style="letter-spacing:-.45pt">ầ</span>n <span style="letter-spacing:-.4pt">ge</span>n <span style="letter-spacing:-.4pt">trê</span>n <span style="letter-spacing:-.35pt">m</span><span style="letter-spacing:-.4pt">ộ</span>t <span style="letter-spacing:-.45pt">n</span><span style="letter-spacing:-.35pt">h</span><span style="letter-spacing:-.45pt">i</span><span style="letter-spacing:-.35pt">ễ</span>m <span style="letter-spacing:-.4pt">s</span><span style="letter-spacing:-.35pt">ắ</span>c <span style="letter-spacing:-.4pt">t</span><span style="letter-spacing:-.45pt">hể</span>?</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; A. </span></span></span></b><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Lặp đoạn nh<span style="letter-spacing:-.05pt">i</span>ễm sắc t<span style="letter-spacing:.05pt">h</span>ể.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b><span style="color:red">B. </span></b><span style="color:red">Đảo <span style="letter-spacing:-.05pt">đ</span>oạn nhiễm sắc t<span style="letter-spacing:.05pt">h</span>ể</span>.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; C. </span></span></span></b><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Mất đo<span style="letter-spacing:-.05pt">ạ</span>n nhiễm sắc t<span style="letter-spacing:.05pt">h</span>ể.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;<b>D. </b><span style="letter-spacing:-.05pt">Chu</span><span style="letter-spacing:.1pt">y</span>ển đoạn g<span style="letter-spacing:-.05pt">i</span>ữa hai NST <span style="letter-spacing:.05pt">k</span>hác nhau.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:97%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="line-height:97%"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 85: </span></span></span></b><span style="font-size:12.0pt"><span style="line-height:97%"><span style="font-family:&#039;Times New Roman&#039;,serif">Một loài thực vật có bộ nhiễm sắc thể 2n. Cây tứ bội được phát sinh từ loài này có bộ nhiễm sắc thể là</span></span></span></span></span></span><br  />
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<span style="font-size:14pt"><span style="tab-stops:14.2pt 137.0pt 264.0pt 392.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; A</span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">. 2n+1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B</b>. 3n.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C</b>. 2n - 1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">D</span></b><span style="color:red">. 4n.</span></span></span></span></span></span><br  />
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<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 86: </span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Thành phần nào sau đây không thuộc&nbsp; cấu trúc của operon?</span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:137.0pt 264.0pt 392.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;<span style="color:red">&nbsp;A</span></span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">. Gen điều hòa</span></span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B</b>. Vùng vận hành.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C</b>. Nhóm gen cấu trúc.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D</b>.Vùng khởi động.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 87:</span></span></span></b><b> </b><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="letter-spacing:.1pt">T</span></span></span></span><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="letter-spacing:.05pt">r</span></span></span></span><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">ong <span style="letter-spacing:-.05pt">l</span><span style="letter-spacing:.05pt">ị</span>ch <span style="letter-spacing:.05pt">s</span>ử p<span style="letter-spacing:-.1pt">hát </span><span style="letter-spacing:.05pt">t</span><span style="letter-spacing:-.1pt">r</span><span style="letter-spacing:.05pt">i</span>ển <span style="letter-spacing:-.05pt">c</span>ủa <span style="letter-spacing:-.1pt">s</span><span style="letter-spacing:.05pt">i</span>nh <span style="letter-spacing:-.1pt">g</span><span style="letter-spacing:.05pt">i</span><span style="letter-spacing:-.1pt">ớ</span>i <span style="letter-spacing:.05pt">tr</span><span style="letter-spacing:-.1pt">ê</span>n <span style="letter-spacing:.1pt">T</span><span style="letter-spacing:.05pt">r</span><span style="letter-spacing:-.1pt">á</span>i Đấ<span style="letter-spacing:.05pt">t</span>, <span style="letter-spacing:-.05pt">t</span>hực <span style="letter-spacing:-.1pt">v</span>ật c<span style="letter-spacing:-.35pt">ó </span>h<span style="letter-spacing:-.1pt">o</span>a xu<span style="letter-spacing:-.1pt">ấ</span>t <span style="letter-spacing:-.1pt">h</span><span style="letter-spacing:.05pt">i</span>ện ở <span style="letter-spacing:-.1pt">k</span>ỉ</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="letter-spacing:-.05pt">&nbsp;&nbsp; A</span></span></span></span></b><b><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">.</span></span></span></b><span style="font-size:12.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"> <span style="letter-spacing:.1pt">T</span><span style="letter-spacing:-.1pt">h</span>an đ<span style="letter-spacing:-.1pt">á</span>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b><span style="letter-spacing:.1pt">B</span>.</b> <span style="letter-spacing:-.05pt">Đ</span>ệ <span style="letter-spacing:-.05pt">t</span>ứ.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b><span style="color:red"><span style="letter-spacing:-.05pt">C</span></span><span style="color:red">.</span></b><span style="color:red"> Ph<span style="letter-spacing:-.1pt">ấ</span>n <span style="letter-spacing:-.05pt">t</span><span style="letter-spacing:.05pt">r</span>ắn<span style="letter-spacing:-.1pt">g</span>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><b><span style="letter-spacing:-.05pt">D</span>. </b><span style="letter-spacing:-.05pt">Đ</span>ệ<span style="letter-spacing:.05pt"> t</span>a<span style="letter-spacing:-.15pt">m</span>.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 88: </span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Theo lí thuyết, phép lai nào sau đây cho đời con có 1 loại kiểu gen?</span></span></span></span><br  />
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<span style="font-size:14pt"><span style="tab-stops:140.0pt 267.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; A</span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">. AA × Aa.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B</b>. Aa × aa.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C</b>. Aa × Aa.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">D</span></b><span style="color:red">. AA × AA</span>.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 89: </span></span></b><span lang="PT-BR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Trong các mối quan hệ sinh học giữa các loài sau đây, quan hệ nào là kiểu quan hệ cạnh tranh?</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b>&nbsp; </b><b><span lang="PT-BR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">A.</span></span></span></b><span lang="PT-BR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"> Lúa và cỏ dại trong một ruộng lúa.</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span lang="PT-BR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">B.</span></span></b> <span lang="PT-BR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Chim sâu và sâu ăn lá</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="PT-BR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; C.</span></span></b><span lang="PT-BR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> Lợn và giun đũa sống trong ruột lợn&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>D.</b> Mối và trùng roi sống trong ruột mối</span></span><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu Câu 90: </span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Sinh vật nào sau đây có cặp NST giới cái là XX và ở giới đực là XY</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:19.85pt 147.4pt 275.0pt 402.55pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; A. </span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Chim.<b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color:red">B. </span></b><span style="color:red">Thỏ.</span><b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C.</b>Bướm.<b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D.</b>Châu chấu.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:14.2pt 5.0cm 269.35pt 14.0cm"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 91: </span></span></b><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Gen chi phối đến sự hình thành nhiều tính trạng được gọi là</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:14.2pt 5.0cm 269.35pt 14.0cm"><span style="font-family:&#039;.VnTime&#039;,sans-serif">&nbsp;&nbsp; <b><span lang="DE" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">A.</span></span></b><span lang="DE" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> gen trội.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> gen điều hòa.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">&nbsp;&nbsp;&nbsp;&nbsp; C.</span></b><span style="color:red"> gen đa hiệu.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><b>D.</b> gen tăng cường.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 92: </span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Trong hệ mạch kín, máu trao đổi chất với tế bào ở đâu?</span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:10.0pt 260.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; <b>A. </b>Qua thành tĩnh mạch và mao mạch.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">B. </span></b><span style="color:red">Qua thành mao mạch.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:10.0pt 260.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; &nbsp;&nbsp;<b>C. </b>Qua thành động mạch và mao mạch.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D. </b>Qua thành động mạch và tĩnh mạch.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:97%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="line-height:97%"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 93: </span></span></span></b><span style="font-size:12.0pt"><span style="line-height:97%"><span style="font-family:&#039;Times New Roman&#039;,serif">Bằng cách áp dụng kĩ thuật nào sau đây có thể&nbsp; tạo ra<b> </b>cây có kiểu gen đồng hợp tử về tất cả các gen?</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">&nbsp;&nbsp; A. </span></span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">Nuôi cấy hạt phấn.</span></span></span><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. </span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Nuôi cấy mô.</span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; C. </span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Lai tế bào sinh dưỡng.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D. </b>Lai hữu tính.</span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 94: </span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;Kiểu phân bố nào sau đây&nbsp; là kiểu phân bố cá thể của quần xã sinh vật trong tự nhiên?</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">&nbsp;&nbsp; A.</span></span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"> Phân bố theo chiều thẳng đứng.</span></span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:blue">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> </span></span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">Phân bố đồng đều (Phân bố đều). </span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">&nbsp;&nbsp; C.</span></span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black"> Phân bố theo nhóm.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>&nbsp;&nbsp;&nbsp;&nbsp;D.</b> Phân bố ngẫu nhiên.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:95%"><span style="tab-stops:27.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="line-height:95%"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 95: </span></span></span></b><span style="font-size:12.0pt"><span style="line-height:95%"><span style="font-family:&#039;Times New Roman&#039;,serif">Trật tự nào sau đây của chuỗi thức ăn là <b>không</b> đúng?</span></span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:256.8pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; A. </span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Lúa → Chuột→ Mèo→ Diều hâu.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">B. </span></b><span style="color:red">Lúa → Rắn→ Chim→ Diều hâu.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:256.8pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; C. </span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Lúa → Chuột→ Rắn→ Diều hâu.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D. </b>Lúa → Chuột→ Cú→ Diều hâu.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 96:</span></span></b><b> </b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">Trong tế</span></span></span><b> </b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">bào, các gen nằm trên cùng một nhiễm sắc thể</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:rgb(51, 101, 255);">&nbsp;&nbsp; A. </span></span></span></b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">luôn giống nhau về</span></span></span><b> </b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">số</span></span></span><b> </b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">lượng, thành phần và trật tự</span></span></span><b> </b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">sắp xếp các loại nuclêôtit.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:rgb(51, 101, 255);">&nbsp;&nbsp; B. </span></span></span></b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">phân li</span></span></span><b> </b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">độc lập, tổ</span></span></span><b> </b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">hợp tự</span></span></span><b> </b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">do trong quá trình giảm phân hình thành giao tử.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">&nbsp;&nbsp; C.</span></span></span></b> <span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif">luôn tương tác với nhau cùng quy định một tính trạng.</span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">&nbsp; &nbsp;D.</span></span></span></b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"> tạo thành một nhóm gen liên kết và có xu hướng di truyền cùng nhau.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 97:</span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> Theo thuyết tiến hóa hiện đại, nhân tố tiến hóa nào sau đây có thể làm nghèo vốn gen của quần thể,làm giảm tính đa dạng di truyền ? </span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:19.85pt 147.4pt 275.0pt 402.55pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; A.</span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> Chọn lọc tự nhiên. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> Đột biến. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:19.85pt 147.4pt 275.0pt 402.55pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; <span style="color:red">C.</span></span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"> Giao phối không ngẫu nhiên.</span></span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D.</b> Di - nhập gen. </span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 98:</span></span></b><b> </b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">Tập hợp sinh vật nào sau</span></span></span><b> </b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">đây</span></span></span><b> </b><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">không</span></span></span></b><b> </b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">phải là quần thể</span></span></span><b> </b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">sinh vật?</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:246.25pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">&nbsp;&nbsp; A. </span></span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">Tập hợp cá trong Hồ<b> </b>Tây.</span></span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:rgb(51, 101, 255);">B. </span></b><span style="color:black">Tập hợp cây tràm</span><b> </b><span style="color:black">ở</span><b> </b><span style="color:black">rừng U Minh Thượng.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:246.25pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:rgb(51, 101, 255);">&nbsp;&nbsp; C. </span></span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">Tập hợp chim hải âu trên</span></span></span><b> </b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">đảo Trường Sa.</span></span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:rgb(51, 101, 255);">D. </span></b><span style="color:black">Tập hợp cây cọ</span><b> </b><span style="color:black">trên một quả đồi</span><b> </b><span style="color:black">ở</span><b> </b><span style="color:black">Phú Thọ.</span></span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>Câu 99:</b> Theo quan niệm tiến hoá hiện đại, nguồn nguyên liệu thứ cấp cung cấp cho chọn lọc tự nhiên là</span></span></span><br  />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; <b>A.</b> đột biến gen.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">B.</span></b><span style="color:red"> biến dị tổ hợp.</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C.</b> thường biến.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; <b>D.</b> đột biến nhiễm sắc thể.</span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 100:</span></span></b> <span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">Tập hợp các kiểu hình của cùng một kiểu gen tương</span></span></span><b> </b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">ứng với các môi trường khác nhau</span></span></span><b> </b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">được gọi là</span></span></span></span></span><br  />
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<span style="font-size:14pt"><span style="tab-stops:246.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b>&nbsp; </b><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">&nbsp;A. </span></span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">mức phản<b> </b>ứng của kiểu gen.</span></span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:rgb(51, 101, 255);">B. </span></b><span style="color:black">biến dị</span><b> </b><span style="color:black">tổ</span><b> </b><span style="color:black">hợp.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:246.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:rgb(51, 101, 255);">&nbsp;&nbsp; C. </span></span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">sự</span></span></span><b> </b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">mềm dẻo của kiểu hình (thường biến).</span></span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:rgb(51, 101, 255);">D. </span></b><span style="color:black">thể đột biến.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 101:</span></span></b> <b>&nbsp;</b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">Nhân tố</span></span></span><b> </b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">tiến hoá nào sau</span></span></span><b> </b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">đây có thể</span></span></span><b> </b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">làm cho một alen có lợi bị</span></span></span><b> </b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">loại bỏ</span></span></span><b> </b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">hoàn toàn khỏi quần thể</span></span></span><b> </b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">và một alen có hại trở nên phổ biến trong quần thể?</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:246.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:rgb(51, 101, 255);">&nbsp;&nbsp; A. </span></span></span></b><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">Đột biến.</span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="font-size:11.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:rgb(51, 101, 255);">B. </span></span></span></b><span style="font-size:11.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">Giao phối không ngẫu nhiên.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:130%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b>&nbsp;&nbsp; </b><b><span style="font-size:11.5pt"><span style="line-height:130%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">C. </span></span></span></span></b><span style="font-size:11.5pt"><span style="line-height:130%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">Các yếu tố<b> </b>ngẫu nhiên.</span></span></span></span>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; <b><span style="font-size:11.0pt"><span style="line-height:130%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:rgb(51, 101, 255);">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;D. </span></span></span></span></b><span style="font-size:11.0pt"><span style="line-height:130%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">Chọn lọc tự</span></span></span></span><b> </b><span style="font-size:11.0pt"><span style="line-height:130%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">nhiên </span></span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 102:</span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> <span style="color:black">Những hoạt động&nbsp; nào sau đây được xem là những giải pháp nâng cao hiệu quả sử dụng hệ sinh thái ?</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">(1) Bón phân ,tưới nước đối với hệ sinh thái nông nghiệp.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">(2) Khai thác tối đa và triệt để các nguồn tài nguyên thiên nhiên.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">(3)Bảo vệ các loài thiên địch.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">(4) Xây dựng các hệ sinh thái nhân tạo một cách hợp lý.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">(5) Tăng cường sử dụng các loại thuốc hóa học để diệt trừ sâu hại.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">Đáp án đúng là:</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">&nbsp;&nbsp; A.</span></span></span></b><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"> (1), (3) và (4). &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></span><b><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">B.</span></span></b> <span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">(1), (2) và (5). </span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">C.</span></span></b> <span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">(2), (3) và (5). </span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">D.</span></span></b> &nbsp;<span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">(2), (4) và (5).</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:110%"><span style="tab-stops:14.2pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="line-height:110%"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu <span style="letter-spacing:-.05pt">1</span>03:</span></span></span></b><b> </b><span lang="VI" style="font-size:12.0pt"><span style="line-height:110%"><span style="font-family:&#039;Times New Roman&#039;,serif">Để nâng cao năng suất cây trồng, người ta không sử dụng biện pháp nào sau đây:</span></span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:110%"><span style="tab-stops:14.2pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b>&nbsp;&nbsp; </b><b><span lang="VI" style="font-size:12.0pt"><span style="line-height:110%"><span style="font-family:&#039;Times New Roman&#039;,serif">A.</span></span></span></b><span lang="VI" style="font-size:12.0pt"><span style="line-height:110%"><span style="font-family:&#039;Times New Roman&#039;,serif"> Tạo giống mới có cường độ quang hợp cao hơn giống gốc.</span></span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:110%"><span style="tab-stops:14.2pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b>&nbsp;</b><b><span lang="VI" style="font-size:12.0pt"><span style="line-height:110%"><span style="font-family:&#039;Times New Roman&#039;,serif">B.</span></span></span></b><span lang="VI" style="font-size:12.0pt"><span style="line-height:110%"><span style="font-family:&#039;Times New Roman&#039;,serif"> Sử dụng các biện pháp kỹ thuật nhằm làm gia tăng diện tích lá và chỉ số diện tích lá.</span></span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:110%"><span style="tab-stops:14.2pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b>&nbsp;</b><b><span lang="VI" style="font-size:12.0pt"><span style="line-height:110%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">C.</span></span></span></span></b><span lang="VI" style="font-size:12.0pt"><span style="line-height:110%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"> Tăng bón phân đạm để phát triển mạnh bộ lá đến mức tối đa.</span></span></span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:110%"><span style="tab-stops:14.2pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b>&nbsp;</b><b><span lang="VI" style="font-size:12.0pt"><span style="line-height:110%"><span style="font-family:&#039;Times New Roman&#039;,serif">D.</span></span></span></b><span lang="VI" style="font-size:12.0pt"><span style="line-height:110%"><span style="font-family:&#039;Times New Roman&#039;,serif"> Chọn các giống cây trồng có thời gian sinh trưởng thích hợp, trồng vào mùa vụ phù hợp. </span></span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:103%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b>&nbsp;</b><b><span style="font-size:12.0pt"><span style="line-height:103%"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 104: </span></span></span></b><span lang="DE" style="font-size:12.0pt"><span style="line-height:103%"><span style="font-family:&#039;Times New Roman&#039;,serif">Một quần thể đang ở trạng thái cân bằng di truyền có tần số alen A là 0,2 và alen a là 0,8. Kiểu gen dị hợp chiếm tỉ lệ bao nhiêu?</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:95%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="DE" style="font-size:12.0pt"><span style="line-height:95%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; A.</span></span></span></b><span lang="DE" style="font-size:12.0pt"><span style="line-height:95%"><span style="font-family:&#039;Times New Roman&#039;,serif"> 0,68.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">B.</span></b><span style="color:red"> 0,32.</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>&nbsp; C.</b> 0,16.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D.</b> 0,48.</span></span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span class="fontstyle21" style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black"><b>Câu 105</b></span></span><b>:</b> <span style="color:black">Trên mạch mang mã gốc của gen có một bộ ba 3&#039;GXT5&#039;. Bộ ba tương ứng trên phân tử mARN được phiên mã từ gen này là</span></span></span></span><br  />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">&nbsp;&nbsp; <b>A.</b> 5&#039;GXU3&#039;<b>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;</b></span><b><span style="color:red">B.</span></b><span style="color:red"> 5&#039;XGA3&#039;.</span><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C.</b> 3&#039;GXT5&#039;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D.</b> 5&#039;XGU3&#039;.&nbsp;</span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 106:</span></span></b> <span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Khi nói về ảnh hưởng của các nhân tố môi trường đến hô hấp hiếu khí ở thực vật, phát biểu nào sau đây sai?</span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; A.</span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> Nhiệt độ môi trường ảnh hưởng đến hô hấp của thực vật.</span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; B.</span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> Nồng độ CO2 cao có thể ức chế quá trình hô hấp.</span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; <span style="color:red">C.</span></span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"> Trong điều kiện thiếu oxi , thực vật tăng cường hô hấp hiếu khí.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; <b>D.</b> Các loại hạt khô như hạt thóc có cường độ hô hấp thấp.</span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:130%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="VI" style="font-size:12.0pt"><span style="line-height:130%"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 10</span></span></span></b><b><span style="font-size:12.0pt"><span style="line-height:130%"><span style="font-family:&#039;Times New Roman&#039;,serif">7:</span></span></span></b><span style="font-size:12.0pt"><span style="line-height:130%"><span style="font-family:&#039;Times New Roman&#039;,serif"> Bộ NST trong tế bào sinh dưỡng của một cá thể được ký hiệu là 2n + 1, đó là dạng đột biến</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:130%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="line-height:130%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; <b>&nbsp;<span style="color:red">A. </span></b><span style="color:red">thể tam nhiễm.&nbsp;&nbsp;&nbsp; </span>&nbsp;&nbsp;&nbsp; <b>B. </b>thể đa nhiễm.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C. </b>thể khuyết nhiễm.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D. </b>thể một nhiễm.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="VI" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 10</span></span></b><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">8: </span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Khi nói về tiêu hóa ở chim bồ câu, có bao nhiêu phát biểu sau đây đúng?</span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">I. Vừa có tiêu hóa nội bào vừa có tiêu hóa ngoại bào.</span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">II. Dạ dạy tuyến nằm giữa diều và dạ dày cơ.</span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">III. Tiêu hóa hóa học chủ yếu diễn ra ở dạ dày cơ.</span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">IV. Diều là cơ quan dự trữ thức ăn.</span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">&nbsp;&nbsp; A.</span></span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"> 2.</span></span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> 4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C.</b> 3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D.</b> 1.</span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:95%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span style="font-size:12.0pt"><span style="line-height:95%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;<b>Câu 109:</b></span></span></span><b> </b><span style="font-size:12.0pt"><span style="line-height:95%"><span style="font-family:&#039;Times New Roman&#039;,serif">Biết rằng không xảy ra đột biến. Theo lí thuyết, phép lai AaBb × aabb cho đời con có bao nhiêu loại kiểu gen?</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:163.3pt 284.8pt 406.3pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; A.</span></span></b> <span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">B.</span></b><span style="color:red"> 4.</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C.</b> 2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D.</b> 1.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 110:</span></span> </b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Cho biết quá trình giảm phân không xảy ra đột biến nhưng xảy ra hoán vị gen với tần số 20%. Theo lí thuyết, tỉ lệ các loại giao tử được tạo ra từ quá trình giảm phân của cơ thể có kiểu gen AB/ab là:</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">&nbsp;&nbsp; A.</span></span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"> AB = ab = 40% và Ab = aB = 10%.</span></span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> AB = ab = 30% và Ab = aB = 20%. </span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; C.</span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> AB = ab = 20% và Ab = aB = 30%.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D. </b>AB = ab = 10% và Ab = aB = 40%.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 111: </span></span></b><span lang="IT" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Giả sử gen B ở sinh vật nhân thực gồm 2400 nuclêôtit và có số nuclêôtit loại ađênin (A) gấp 3 lần số nuclêôtit loại guanin (G). Một đột biến điểm xảy ra làm cho gen B bị đột biến thành alen b. Alen b có chiều dài không đổi nhưng tăng lên 1 liên kết hiđrô so với gen B. Số lượng từng loại nuclêôtit của alen b là:</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; A.</span></span></b><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> A = T = 299; G = X = 901.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> <span style="color:red">A = T = 899; G = X = 301.</span> </span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; C.</span></span></b><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> A = T = 901; G = X = 299. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>D. </b>A = T = 301; G = X = 899.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 112:</span></span></b> <span lang="VI" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Ở đậu&nbsp; thơm,&nbsp; tính&nbsp; trạng màu hoa do 2 cặp gen&nbsp; (A, a và B, b) phân&nbsp; li độc&nbsp; lập cùng&nbsp; tham gia quy định&nbsp; theo kiểu tương tác bổ sung. Khi trong kiểu gen đồng thời có mặt cả 2 gen trội A và B thì cho kiểu hình hoa đỏ thẫm, các kiểu gen còn lại đều cho kiểu hình hoa trắng. Cho biết quá trình giảm phân diễn ra bình&nbsp; thường, phép lai nào sau đây cho đời con có kiểu hình phân li theo tỉ lệ 9 cây hoa đỏ thẫm : 7 cây hoa trắng?</span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:135.4pt 256.9pt 378.45pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b>&nbsp;&nbsp; </b><b><span lang="VI" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">A.</span></span></span></b><span lang="VI" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"> AaBb x AaBb.</span></span></span><span lang="VI" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> AaBb x Aabb.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C.</b> AaBb x aaBb.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><b><span lang="NL" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">D.</span></span></b><span lang="NL" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> AaBb x AAbb.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 113:</span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> Một nghiên cứu trước đây cho thấy sắc tố hoa đỏ của một loài thực vật là kết quả của</span></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">một con đường chuyển hóa gồm nhiều bước và các sắc tố trung gian đều màu trắng. 3 dòng đột</span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">biến thuần chủng hoa màu trắng (trắng 1, trắng 2 và trắng 3) của loài này được lai với nhau theo</span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">từng cặp và tỷ lệ phân li kiểu hình đời con như sau:</span></span></span>

<table class="Table" style="margin-left:59px; border-collapse:collapse; border:solid black 1.0pt">
	<tbody>
		<tr style="height:13.75pt">
			<td style="border:solid black 1.0pt; width:96.2pt; padding:0cm 0cm 0cm 0cm; height:13.75pt" valign="top" width="128"><span style="font-size:11pt"><span style="line-height:12.75pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt">Số phép lai</span></span></span></span></td>
			<td style="border:solid black 1.0pt; width:121.95pt; border-left:none; padding:0cm 0cm 0cm 0cm; height:13.75pt" valign="top" width="163"><span style="font-size:11pt"><span style="line-height:12.75pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt">Phép lai</span></span></span></span></td>
			<td style="border:solid black 1.0pt; width:91.75pt; border-left:none; padding:0cm 0cm 0cm 0cm; height:13.75pt" valign="top" width="122"><span style="font-size:11pt"><span style="line-height:12.8pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt"><span style="position:relative"><span style="top:-.5pt">F</span></span></span><span style="font-size:12.0pt">1</span></span></span></span></td>
			<td style="border:solid black 1.0pt; width:125.45pt; border-left:none; padding:0cm 0cm 0cm 0cm; height:13.75pt" valign="top" width="167"><span style="font-size:11pt"><span style="line-height:12.8pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt"><span style="position:relative"><span style="top:-.5pt">F</span></span></span><span style="font-size:12.0pt">2 <span style="position:relative"><span style="top:-.5pt">(F</span></span>1 <span style="position:relative"><span style="top:-.5pt">× F</span></span>1<span style="position:relative"><span style="top:-.5pt">)</span></span></span></span></span></span></td>
		</tr>
		<tr style="height:13.8pt">
			<td style="border:solid black 1.0pt; width:96.2pt; border-top:none; padding:0cm 0cm 0cm 0cm; height:13.8pt" valign="top" width="128"><span style="font-size:11pt"><span style="line-height:12.75pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt">1</span></span></span></span></td>
			<td style="border-bottom:solid black 1.0pt; width:121.95pt; border-top:none; border-left:none; border-right:solid black 1.0pt; padding:0cm 0cm 0cm 0cm; height:13.8pt" valign="top" width="163"><span style="font-size:11pt"><span style="line-height:12.75pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt">Trắng 1 × Trắng 2</span></span></span></span></td>
			<td style="border-bottom:solid black 1.0pt; width:91.75pt; border-top:none; border-left:none; border-right:solid black 1.0pt; padding:0cm 0cm 0cm 0cm; height:13.8pt" valign="top" width="122"><span style="font-size:11pt"><span style="line-height:12.75pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt">Tất cả đỏ</span></span></span></span></td>
			<td style="border-bottom:solid black 1.0pt; width:125.45pt; border-top:none; border-left:none; border-right:solid black 1.0pt; padding:0cm 0cm 0cm 0cm; height:13.8pt" valign="top" width="167"><span style="font-size:11pt"><span style="line-height:12.75pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt">9 đỏ : 7 trắng</span></span></span></span></td>
		</tr>
		<tr style="height:13.75pt">
			<td style="border:solid black 1.0pt; width:96.2pt; border-top:none; padding:0cm 0cm 0cm 0cm; height:13.75pt" valign="top" width="128"><span style="font-size:11pt"><span style="line-height:12.75pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt">2</span></span></span></span></td>
			<td style="border-bottom:solid black 1.0pt; width:121.95pt; border-top:none; border-left:none; border-right:solid black 1.0pt; padding:0cm 0cm 0cm 0cm; height:13.75pt" valign="top" width="163"><span style="font-size:11pt"><span style="line-height:12.75pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt">Trắng 2 × Trắng 3</span></span></span></span></td>
			<td style="border-bottom:solid black 1.0pt; width:91.75pt; border-top:none; border-left:none; border-right:solid black 1.0pt; padding:0cm 0cm 0cm 0cm; height:13.75pt" valign="top" width="122"><span style="font-size:11pt"><span style="line-height:12.75pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt">Tất cả đỏ</span></span></span></span></td>
			<td style="border-bottom:solid black 1.0pt; width:125.45pt; border-top:none; border-left:none; border-right:solid black 1.0pt; padding:0cm 0cm 0cm 0cm; height:13.75pt" valign="top" width="167"><span style="font-size:11pt"><span style="line-height:12.75pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt">9 đỏ : 7 trắng</span></span></span></span></td>
		</tr>
		<tr style="height:13.8pt">
			<td style="border:solid black 1.0pt; width:96.2pt; border-top:none; padding:0cm 0cm 0cm 0cm; height:13.8pt" valign="top" width="128"><span style="font-size:11pt"><span style="line-height:12.85pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt">3</span></span></span></span></td>
			<td style="border-bottom:solid black 1.0pt; width:121.95pt; border-top:none; border-left:none; border-right:solid black 1.0pt; padding:0cm 0cm 0cm 0cm; height:13.8pt" valign="top" width="163"><span style="font-size:11pt"><span style="line-height:12.85pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt">Trắng 1 × Trắng 3</span></span></span></span></td>
			<td style="border-bottom:solid black 1.0pt; width:91.75pt; border-top:none; border-left:none; border-right:solid black 1.0pt; padding:0cm 0cm 0cm 0cm; height:13.8pt" valign="top" width="122"><span style="font-size:11pt"><span style="line-height:12.85pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt">Tất cả đỏ</span></span></span></span></td>
			<td style="border-bottom:solid black 1.0pt; width:125.45pt; border-top:none; border-left:none; border-right:solid black 1.0pt; padding:0cm 0cm 0cm 0cm; height:13.8pt" valign="top" width="167"><span style="font-size:11pt"><span style="line-height:12.85pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:12.0pt">9 đỏ : 7 trắng</span></span></span></span></td>
		</tr>
	</tbody>
</table>
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Biết rằng không xảy ra đột biến. Có bao nhiêu phát biểu sau đây đúng?</span></span>

<ol style="list-style-type:upper-roman">
	<li><span style="font-size:12pt"><span style="tab-stops:52.1pt"><span style="text-autospace:none"><span style="font-family:&#039;Times New Roman&#039;,serif">Kết quả này chứng tỏ rằng màu hoa do hai gen nằm trên 2 NST khác nhau quy định.</span></span></span></span></li>
	<li><span style="font-size:12pt"><span style="tab-stops:56.15pt"><span style="text-autospace:none"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="position:relative"><span style="top:-.5pt">Các cây <span style="letter-spacing:.25pt">F</span></span></span><span style="letter-spacing:.25pt">1 </span><span style="position:relative"><span style="top:-.5pt">dị hợp tử về tất cả các gen quy định màu hoa.</span></span></span></span></span></span></li>
	<li><span style="font-size:12pt"><span style="tab-stops:60.15pt"><span style="text-autospace:none"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="position:relative"><span style="top:-.5pt">Cá thể <span style="letter-spacing:.25pt">F</span></span></span><span style="letter-spacing:.25pt">1 </span><span style="position:relative"><span style="top:-.5pt">của phép lai 1 lai với cá thể trắng 3 sẽ cho tất cả đời con đều trắng.</span></span></span></span></span></span></li>
	<li><span style="font-size:12pt"><span style="tab-stops:60.75pt"><span style="text-autospace:none"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="position:relative"><span style="top:-.5pt">Lai cá thể <span style="letter-spacing:.25pt">F</span></span></span><span style="letter-spacing:.25pt">1 </span><span style="position:relative"><span style="top:-.5pt">của phép lai 1 với <span style="letter-spacing:.25pt">F</span></span></span><span style="letter-spacing:.25pt">1 </span><span style="position:relative"><span style="top:-.5pt">của phép lai 3 sẽ cho đời con có 1/4 là kiểu hình trắng.</span></span></span></span></span></span></li>
</ol>
<span style="font-size:14pt"><span style="tab-stops:163.3pt 284.8pt 406.25pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">&nbsp;&nbsp; A.</span></span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"> 1.</span></span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> 2. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C.</b> 3. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D.</b> 4. </span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 114:</span></span></b> <span lang="NL" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Ở một loài thực vật, gen A quy định thân cao trội hoàn toàn so với gen a quy định thân thấp; gen B quy định hoa đỏ trội hoàn toàn so với gen b quy định hoa vàng. Hai cặp gen này nằm trên cặp NST tương đồng số 1; gen D quy định quả tròn trội hoàn toàn so với gen d quy định quả dài, nằm trên cặp NST tương đồng số 2. Cho giao phấn giữa 2 cây P đều thuần chủng được F<sub>1</sub> dị hợp về 3 cặp gen. Cho F<sub>1</sub> giao phấn với nhau thu được F<sub>2</sub>, trong đó cây có kiểu hình thân thấp, hoa vàng, quả tròn chiếm 12%. Biết hoán vị gen xảy ra trong cả quá trình phát sinh giao tử đực và cái với tần số bằng nhau. Lấy ngẫu nhiên 3 cá thể ở F<sub>2</sub>, xác suất để thu được 2 cá thể có kiểu hình mang đúng 2 tính trạng trội là:</span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:130.25pt 246.75pt 363.25pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="NL" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">&nbsp;&nbsp; A.</span></span></span></b><span lang="NL" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"> 18,9%.</span></span></span><span lang="NL" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> 49,5%.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C.</b> 66%.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D.</b> 4,95%.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:27.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 115:</span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> Xét phép lai P: ♂AaBb × ♀AaBb. Trong quá trình giảm phân, ở cơ thể đực có 4% số tế bào xảy ra sự không phân li của cặp Aa trong giảm phân I, giảm phân II bình thường, các tế bào khác giảm phân bình thường. Cơ thể cái giảm phân bình thường. Theo lí thuyết, tỉ lệ hợp tử mang kiểu gen AAaBb được tạo ra ở F<sub>1 </sub>là</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:95%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="line-height:95%"><span style="font-family:&#039;Times New Roman&#039;,serif">A.</span></span></span></b><span style="font-size:12.0pt"><span style="line-height:95%"><span style="font-family:&#039;Times New Roman&#039;,serif"> 0,25%. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> 1,0%. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">C.</span></b><span style="color:red"> 0,5%.</span> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D.</b> 1,25%.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:96%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="line-height:96%"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 116:</span></span></span></b> <span lang="PL" style="font-size:12.0pt"><span style="line-height:96%"><span style="font-family:&#039;Times New Roman&#039;,serif">Có 2 tế bào sinh trứng của cơ thể có </span></span></span><span lang="PL" style="font-size:12.0pt"><span style="line-height:96%"><span style="font-family:&#039;Times New Roman&#039;,serif">kiểu gen </span></span></span><span lang="DE" style="font-size:12.0pt"><span style="line-height:96%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://khobaitap.com/file:///C:/Users/Admin/AppData/Local/Temp/msohtmlclip1/01/clip_image003.gif" style="width:24px; height:39px" /></span></span></span></span></span><span lang="PL" style="font-size:12.0pt"><span style="line-height:96%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;giảm phân tạo giao tử. Biết không có đột biến. Theo lí thuyết, phát biểu nào sau đây đúng?</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:96%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="PL" style="font-size:12.0pt"><span style="line-height:96%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; A.</span></span></span></b><span lang="PL" style="font-size:12.0pt"><span style="line-height:96%"><span style="font-family:&#039;Times New Roman&#039;,serif"> Nếu không có tế bào nào xảy ra hoán vị gen thì tối đa sẽ tạo ra 4 loại giao tử.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:96%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="PL" style="font-size:12.0pt"><span style="line-height:96%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; B.</span></span></span></b><span lang="PL" style="font-size:12.0pt"><span style="line-height:96%"><span style="font-family:&#039;Times New Roman&#039;,serif"> Nếu cả 2 tế bào đều xảy ra hoán vị thì sẽ tạo ra 4 loại giao tử với tỉ lệ 1:1:1:1.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:96%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="IT" style="font-size:12.0pt"><span style="line-height:96%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; &nbsp;<span style="color:red">C.</span></span></span></span></b><span lang="IT" style="font-size:12.0pt"><span style="line-height:96%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"> Nếu chỉ có 1 tế bào xảy ra hoán vị gen thì tối đa chỉ tạo ra 2 loại giao tử với tỉ lệ 1:1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:96%"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="IT" style="font-size:12.0pt"><span style="line-height:96%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; D.</span></span></span></b><span lang="IT" style="font-size:12.0pt"><span style="line-height:96%"><span style="font-family:&#039;Times New Roman&#039;,serif"> Luôn tạo ra giao tử Ab.</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 117:</span></span></b> <span lang="ES" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Ở một loài thực vật, tính trạng hình dạng quả do hai cặp gen không alen (Aa, Bb) phân li độc lập cùng quy định. Khi có mặt của 2 alen trội (A-B-) quy định quả tròn; A-bb quy định quả bầu dục; aaB- và aabb: quả dài. Tính trạng màu sắc hoa do một gen có 2 alen (D và d) quy định. Cho cây (P) tự thụ phấn, thu được F<sub>1</sub> phân li kiểu hình theo tỉ lệ 56,25% cây quả tròn, hoa đỏ: 18,75% cây quả bầu dục, hoa đỏ: 25% cây quả dài, hoa trắng. Biết rằng không xảy ra đột biến, kiểu gen nào của (P) sau đây phù hợp với kết quả trên?</span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:130.45pt 246.95pt 363.45pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="ES" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; A.</span></span></b><span lang="ES" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://khobaitap.com/file:///C:/Users/Admin/AppData/Local/Temp/msohtmlclip1/01/clip_image005.gif" style="width:108px; height:41px" /></span></span>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://khobaitap.com/file:///C:/Users/Admin/AppData/Local/Temp/msohtmlclip1/01/clip_image007.gif" style="width:108px; height:41px" /></span></span>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><b><span lang="DE" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">C. </span></span></span></b><span lang="DE" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://khobaitap.com/file:///C:/Users/Admin/AppData/Local/Temp/msohtmlclip1/01/clip_image009.gif" style="width:51px; height:41px" /></span></span></span></span></span><span lang="ES" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"><span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://khobaitap.com/file:///C:/Users/Admin/AppData/Local/Temp/msohtmlclip1/01/clip_image011.gif" style="width:12px; height:13px" /></span></span></span></span></span><span lang="DE" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://khobaitap.com/file:///C:/Users/Admin/AppData/Local/Temp/msohtmlclip1/01/clip_image009.gif" style="width:51px; height:41px" /></span></span>.</span></span></span><span lang="ES" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; <b>D. </b><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://khobaitap.com/file:///C:/Users/Admin/AppData/Local/Temp/msohtmlclip1/01/clip_image014.gif" style="width:48px; height:41px" /></span></span><span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://khobaitap.com/file:///C:/Users/Admin/AppData/Local/Temp/msohtmlclip1/01/clip_image011.gif" style="width:12px; height:13px" /></span></span><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://khobaitap.com/file:///C:/Users/Admin/AppData/Local/Temp/msohtmlclip1/01/clip_image014.gif" style="width:48px; height:41px" /></span></span>.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 118:</span></span></b> <span lang="EN" style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">Tr<span style="letter-spacing:-.05pt">o</span>ng <span style="letter-spacing:-.1pt">m</span>ột tế bào sinh tinh, xét hai <span style="letter-spacing:-.05pt">c</span>ặp<span style="letter-spacing:.05pt"> n</span>h<span style="letter-spacing:-.05pt">i</span>ễm sắc thể đư<span style="letter-spacing:.05pt">ợ</span>c kí h<span style="letter-spacing:-.05pt">i</span><span style="letter-spacing:.05pt">ệ</span>u là Aa và Bb. Khi tế bào này giảm phân, <span style="letter-spacing:.05pt">c</span>ặp Aa phân li bình th</span></span></span><span lang="VI" style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">ường, cặp Bb <span style="letter-spacing:-.05pt">k</span>hông phân li trong giảm phân I, g<span style="letter-spacing:-.05pt">i</span>ảm phân II d<span style="letter-spacing:-.05pt">iễ</span>n ra b</span></span></span><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">ình th</span></span></span><span lang="VI" style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">ư<span style="letter-spacing:.05pt">ờ</span>ng. Các loại giao <span style="letter-spacing:-.05pt">t</span>ử có thể <span style="letter-spacing:-.05pt">đư</span><span style="letter-spacing:.05pt">ợ</span>c tạo ra <span style="letter-spacing:-.05pt">t</span>ừ quá tr</span></span></span><span style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:black">ình g<span style="letter-spacing:-.05pt">i</span>ảm phân của <span style="letter-spacing:.05pt">t</span>ế bào trên là</span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="EN" style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; A.</span></span></b> <span lang="EN" style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Abb và B hoặc ABB <span style="letter-spacing:-.05pt">v</span>à b.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;<b>B.</b> ABb và A hoặc aBb và a.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:13.0pt"><span style="text-autospace:none"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span lang="EN" style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; C.</span></span></b> <span lang="EN" style="font-size:11.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif">ABB và <span style="letter-spacing:-.05pt">a</span>bb hoặc AAB và aab.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;<b><span style="color:red">D.</span></b> <span style="color:red">ABb và a hoặc aBb và A.</span></span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:12.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Câu 119: </span></span></b><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Ở một loài thực vật, xét hai gen phân li độc lập, mỗi gen quy định một tính trạng và mỗi gen đều có hai alen. Cho hai cây (P) thuần chủng có kiểu hình khác nhau về cả hai tính trạng giao phấn với nhau, thu được F<sub>1</sub>. Cho các cây F<sub>1</sub> giao phấn với nhau, thu được F<sub>2</sub>. Cho biết không phát sinh đột biến mới và sự biểu hiện của gen không phụ thuộc vào điều kiện môi trường. Theo lí thuyết, có bao nhiêu nhận định <b><u>đúng</u></b>?</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:12.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; (1). ở F<sub>2</sub> có tối đa bao 9 loại kiểu hình với 9 loại kiểu gen.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:12.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; (2). ở F<sub>2</sub> có tối thiểu 4 loại kiểu hình với 9 loại kiểu gen.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:12.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; (3). ở F<sub>2</sub> có thể có 6 loại kiểu hình với 9 loại kiểu gen.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:12.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; (4). ở F<sub>2</sub> có tối đa bao 9 loại kiểu hình với 10 loại kiểu gen.</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:12.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><span lang="FR" style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; (5). ở F<sub>2</sub> có thể có 6 loại kiểu hình với 10 loại kiểu gen</span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="tab-stops:12.0pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; A.</span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"> 1. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>B.</b> 2. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color:red">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>C.</b> 3.</span> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>D.</b> 4. </span></span></span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>Câu 120:</b> Một quần thể người đang ở trạng thái cân bằng di truyền, tần số người bị mắc một bệnh di truyền đơn gen là 4%. Phả hệ dưới đây cho thấy một số thành viên (màu đen) bị một bệnh này. Kiểu hình của người có đánh dấu (?) là chưa biết.</span></span><br  />
<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif">                                      
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			<div><span style="line-height:12.15pt"><b>1</b></span></div>
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			<div><span style="line-height:12.15pt"><b>2</b></span></div>
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			<div><span style="line-height:12.15pt"><b>3</b></span></div>
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			<div><span style="line-height:12.15pt"><b>4</b></span></div>
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			<div><span style="line-height:12.15pt"><b>5</b></span></div>
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			<div><span style="line-height:12.15pt"><b>6</b></span></div>
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			<div><span style="line-height:12.15pt"><b>7</b></span></div>
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			<div><span style="line-height:12.15pt"><b>?</b></span></div>
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			<div><span style="line-height:12.15pt"><b>9</b></span></div>
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  <span style="position:absolute; margin-left:247px; margin-top:6px; width:268px"><span style="z-index:251657216"><span style="left:0px"><span style="height:117px"><img alt="" src="https://khobaitap.com/file:///C:/Users/Admin/AppData/Local/Temp/msohtmlclip1/01/clip_image019.gif" style="width:268px; height:117px" /></span></span></span></span><a name="18_SH_132"></a><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>I</b></span></span></span></span><br  />
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<span style="font-size:14pt"><span style="line-height:11.55pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">II</span></span></b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:11.55pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">8</span></span></b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:11.75pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">III</span></span></b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:11.75pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">10</span></span></b></span></span></span><br  />
<span style="font-size:12pt"><span style="line-height:13.8pt"><span style="font-family:&#039;Times New Roman&#039;,serif">Có bao nhiêu kết luận dưới đây đúng?</span></span></span>

<ol style="list-style-type:upper-roman">
	<li><span style="font-size:12pt"><span style="tab-stops:52.1pt"><span style="text-autospace:none"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="position:relative"><span style="top:-.5pt">Cá thể <span style="letter-spacing:.1pt">III</span></span></span><span style="letter-spacing:.1pt">9 </span><span style="position:relative"><span style="top:-.5pt">chắc chắn không mang alen gây bệnh.</span></span></span></span></span></span></li>
	<li><span style="font-size:12pt"><span style="line-height:13.8pt"><span style="tab-stops:56.15pt"><span style="text-autospace:none"><span style="font-family:&#039;Times New Roman&#039;,serif">Có tối đa 2 cá thể có thể không mang alen gây bệnh.</span></span></span></span></span></li>
	<li><span style="font-size:12pt"><span style="tab-stops:60.15pt"><span style="text-autospace:none"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="position:relative"><span style="top:-.5pt">Xác suất để cá thể <span style="letter-spacing:.15pt">II</span></span></span><span style="letter-spacing:.15pt">3 </span><span style="position:relative"><span style="top:-.5pt">có kiểu gen dị hợp tử là 50%.</span></span></span></span></span></span></li>
	<li><span style="font-size:12pt"><span style="tab-stops:60.75pt"><span style="text-autospace:none"><span style="font-family:&#039;Times New Roman&#039;,serif">Xác suất cá thể con III(?) bị bệnh là 16,7%.</span></span></span></span></li>
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<span style="font-size:14pt"><span style="font-family:&#039;.VnTime&#039;,sans-serif"><b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">&nbsp;&nbsp; A. </span></span></span></b><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">1. </span></span></span><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;<b>B. </b>3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>C. </b>2.&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D. </b>4.</span></span></span></span><br  />
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