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		<h1>Bài tập về ADN và GEN</h1>
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			<li>Chủ nhật - 27/09/2020 09:49</li>
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			II. Phương pháp giải bài tập<br />1. Các công thức tính<br />Dạng 1: Tính số lượng , % từng loại Nu của mỗi mạch và của gen<br />     Theo NTBS:  A1 = T2, T1 = A2 , G1 = X2, X1 = G2
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<img alt="" height="435" src="https://khobaitap.com/uploads/news/2020_09/image_189.png" width="670" /><br  />
<img alt="" height="198" src="https://khobaitap.com/uploads/news/2020_09/image_190.png" width="693" /><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:13.0pt">* Bài 1:</span></b><span style="font-size:13.0pt"> Trên mach thứ nhất của gen có 10% A và 35 % G, trên mạch thứ hai có 25%A và 450 G</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:13.0pt">- Tính tỉ lệ % và số lượng từng loại Nuclêôtit ttrên mỗi mạch và cả gen</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:13.0pt">* Bài 2:</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:13.0pt">Một gen có chu kỳ soắn là 90 vòng và có A = 20%. Mạch 1 của gen có A= 20 và T = 30%. Mạch 2 của gen có G = 10% và X = 40%. </span></span></span>
<ol style="list-style-type:lower-alpha">
	<li><span style="font-size:12pt"><span style="tab-stops:list 36.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:13.0pt">Tính chiều dài và khối lượng của gen</span></span></span></span></li>
	<li><span style="font-size:12pt"><span style="tab-stops:list 36.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:13.0pt">Tính số lượng từng loại Nu trên mỗi mạch và của cả gen</span></span></span></span></li>
</ol>
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:13.0pt">* Bài 3: Một gen có khối lượng là 9.10<sup>5</sup> đvC và có G – A = 10%. Tính chiều dài gen và số lượng tỉ lệ % của từng loại Nu của gen</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:13.0pt">* Bài 4: Một gen dài 0,408 Micômet. </span><span lang="PT-BR" style="font-size:13.0pt">Mạch 1 có A = 40%, gấp đôI số A nằm trên mạch 2. Tính số liên kết hoá trịn và số liên kết hyđrô của gen?</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:13.0pt">* Bài 5: Một gen táI sinh một số đợt đã sử dụng của môi trường 21000 nu, trong đó loại A chiếm 4200. Biết tổng số mạch đơn trong các gen tạo ra gấp 8 lần số mạch đơn của gen mẹ ban đầu. </span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:13.0pt">a. Tính số lần táI sinh </span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:13.0pt">b. Tính tỉ lệ % và số lượng từng loại nu của gen</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:13.0pt">* Bài 6: Gen nhân đôI 4 lần đã lấy của môI trường nội bào 36000 nu trong đó có 10800 G. tính số lượng và tỉ lệ % từng loại nu của gen</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="IT" style="font-size:13.0pt">* Bài 7: Một gên nhân đôI liên tiếp 3 lần đã lấy của môI trường nội bào 16800 Nu. Gen có tỉ lệ A: G = 3 : 7</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="IT" style="font-size:13.0pt">a. Tính số LK hiđrrô bị phá vỡ và được hình thành </span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:13.0pt">b. Tính số LK hoa strị được hình thành</span></span></span><br  />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:13.0pt">* Bài 8: Một gen có chiều dài 0,51 Mỉcômet tự nhân đôI một số lần. Thòi gian tách và liên kết các Nu của môI trường của một chu ki xoắn là 0,05 giây. Biết tốc độ lắp ghép đều nhau. Tính tốc đọ nhân đôi và thời gian nhân đôi của gen</span></span></span><br  />
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