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      <title>BÀI TẬP QLDT by </title>
      <link>https://padlet.com/giapdangnamtran/kx7an6vh8c89ox71</link>
      <description>Nộp bài tập </description>
      <language>en-us</language>
      <pubDate>2021-03-22 10:35:50 UTC</pubDate>
      <lastBuildDate>2025-11-06 12:44:18 UTC</lastBuildDate>
      <webMaster>hello@padlet.com</webMaster>
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         <title>BÀI TẬP QLDT MENDEL</title>
         <author>giapdangnamtran</author>
         <link>https://padlet.com/giapdangnamtran/kx7an6vh8c89ox71/wish/1916818824</link>
         <description><![CDATA[<div><strong><br>Câu 6</strong>:Ở ruồi giấm, gene B qui định thân xám, trội hoàn toàn so với gene b qui định thân đen và gene nằm trên nhiễm sắc thể thường. Ruồi bố và ruồi mẹ đều mang kiểu gene dị hợp. Xác suất để xuất hiện ruồi thân xám đồng hợp là:<br><br></div><div><strong><br>A</strong>.75%&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>B</strong>.50%&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>C</strong>.25%&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>D</strong>.12,5%<br><br></div><div><strong><br>Câu 7</strong>:A: qui định tầm vóc thấp; a: qui định tầm vóc cao. Bố mẹ dị hợp thì xác suất sinh 2 đứa con có tầm vóc thấp là bao nhiêu?<br><br></div><div><strong><br>A</strong>.6.25%&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<strong>B</strong>.46.875%&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>C</strong>.56.25%&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<strong>D</strong>.75%<br><br></div><div><strong><br>Câu 8 (ĐH 2009)</strong>:Kiểu gen của cá chép không vảy là Aa, cá chép có vảy là aa. Kiểu gen AA làm trứng không nở. Tính theo lí thuyết, phép lai giữa các cá chép không vảy sẽ cho tỉ lệ kiểu hình ở đời con là<br><br></div><div><strong><br>A</strong>.2 cá chép không vảy : l cá chép có vảy.&nbsp; &nbsp; &nbsp;<br><br></div><div><strong><br>B</strong>.l cá chép không vảy : 2 cá chép có vảy.<br><br></div><div><strong><br>C</strong>.3 cá chép không vảy : l cá chép có vảy.<br><br></div><div><strong><br>D</strong>.100% cá chép không vảy.<br><br></div><div><strong><br>Câu 9 (ĐH 2009)</strong>:Ở đậu Hà Lan, gen A quy định thân cao trội hoàn toàn so với alen a quy định thân thấp. Cho câythân cao giao phấn với cây thân cao, thu được F1 gồm 900 cây thân cao và 299 cây thân thấp. Tính theo lí thuyết, tỉ lệ cây F1 tự thụ phấn cho F2 gồm toàn cây thân cao so với tổng số cây ở F1 là<br><br></div><div><strong><br>A</strong>.3/4&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>B</strong>.1/2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>C</strong>.1/4&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>D</strong>.2/3<br><br></div><div><strong><br>Câu 10 (ĐH 2009)</strong>:Ở cừu, kiểu gen HH quy định có sừng, kiểu gen hh quy định không sừng, kiểu gen Hh biểu hiện có sừng ở cừu đực và không sừng ở cừu cái. Gen này nằm trên nhiễm sắc thể thường. Cho lai cừu đực không sừng với cừu cái có sừng được F1, cho F1 giao phối với nhau được F2. Tính theo lí thuyết, tỉ lệ kiểu hình ởF1 và F2 là:<br><br></div><div><strong><br>A</strong>.F1: 1 có sừng : 1 không sừng; F2: 1 có sừng: 1 không sừng.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<br><br></div><div><strong><br>B</strong>.F1: 1 có sừng : 1 không sừng; F2: 3 có sừng: 1 không sừng.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<br><br></div><div><strong><br>C</strong>.F1: 100% có sừng; F2: 1 có sừng: 1 không sừng.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<br><br></div><div><strong><br>D</strong>.F1: 100% có sừng; F2: 3 có sừng: 1 không sừng.<br><br></div><div><strong><br>Câu 11</strong>:Ở người, kiểu gen I<sup>A</sup>I<sup>A</sup>, I<sup>A</sup>I<sup>O</sup> quy định nhóm máu A; kiểu gen I<sup>B</sup>I<sup>B</sup>, I<sup>B</sup>I<sup>O</sup>quy định nhóm máu B; kiểu gen I<sup>A</sup>I<sup>B</sup> quy định nhóm máu AB; kiểu gen I<sup>O</sup>I<sup>O</sup> quy định nhóm máu O. Tại một nhà hộ sinh, người ta nhầm lẫn 2 đứa trẻ sơ sinh với nhau. Trường hợp nào sau đây không cần biết nhóm máu của người cha mà vẫn có thể xác định được đứa trẻ nào là con của người mẹ nào?<br><br></div><div><strong><br>A</strong>.Hai người mẹ có nhóm máu A và nhóm máu B, hai đứa trẻ có nhóm máu B và nhóm máu A.<br><br></div><div><strong><br>B</strong>.Hai người mẹ có nhóm máu AB và nhóm máu O, hai đứa trẻ có nhóm máu O và nhóm máu AB.<br><br></div><div><strong><br>C</strong>.Hai người mẹ có nhóm máu A và nhóm máu O, hai đứa trẻ có nhóm máu O và nhóm máu A.<br><br></div><div><strong><br>D</strong>.Hai người mẹ có nhóm máu B và nhóm máu O, hai đứa trẻ có nhóm máu B và nhóm máu O.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br><br></div>]]></description>
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         <pubDate>2021-11-29 01:19:39 UTC</pubDate>
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         <pubDate>2021-11-29 01:36:06 UTC</pubDate>
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         <title>Ngô Thị Diệu Hiền</title>
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         <title>Viết Phúc</title>
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         <title>Nguyễn Phan Hồng Vân</title>
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         <pubDate>2021-11-29 01:37:09 UTC</pubDate>
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         <title>Nguyễn Phan Hồng Vân</title>
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         <pubDate>2021-11-29 01:37:46 UTC</pubDate>
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         <title>Nguyễn Thị Thanh Hồng</title>
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         <pubDate>2021-11-29 01:38:03 UTC</pubDate>
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         <title>Lâm</title>
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         <link>https://padlet.com/giapdangnamtran/kx7an6vh8c89ox71/wish/1916846857</link>
         <description><![CDATA[<div>6/ BbxBb --&gt; 3/4B_ : 1/4 bb<br>&nbsp; &nbsp;--&gt;A<br>7/<br>AaxAa --&gt; 3/4 A_ : 1/4aa<br>&nbsp;Xác suất sinh 2 con thấp: 3/4 x 3/4 = 56,25%<br>&nbsp;--&gt;C<br>8/<br>AaxAa --&gt; 1/4 AA : 1/2 Aa : 1/4 aa<br>&nbsp;AA không nở --&gt; 2/3 k vây : 1/3 có vây<br>--&gt;A<br>9/<br>F1: 3 cao :1 thấp --&gt; KG P: AaxAa --&gt; A; cao, a: thấp<br>&nbsp;KG f1: 1/4 AA:2/4Aa:1/4aa<br>F1 tự thụ cho 100% F2 --&gt; AA<br>tỉ lệ : 1/4 : 2/4 --&gt; 1/2<br>B<br>10/P HHxhh --&gt; F1: 100%Hh --&gt; 1 sừng: 1 k sừng<br>F1xF1 --&gt; F2: 1/4HH: 2/4Hh:1/4hh<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;--&gt; 1/2 sừng: 1/2 k sừng<br>--&gt;A</div>]]></description>
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         <pubDate>2021-11-29 01:38:24 UTC</pubDate>
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         <title>Trần Thị Mỹ Uyên</title>
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         <title>Hoàng Thị Ánh Ngọc</title>
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         <title>Trần Thị Mỹ Uyên</title>
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         <title>Trần Ngọc Anh Thư</title>
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         <title>Trần Thị Mỹ Tâm </title>
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         <title>Nguyễn Thị Phương Loan</title>
         <author>loanphuong21032004</author>
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         <pubDate>2021-11-29 01:40:43 UTC</pubDate>
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         <title>Lê Ngọc Nhật Anh</title>
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         <title>Lê Thanh Hà Đức 1</title>
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         <title>Bích Hiền</title>
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         <title>Lê Thanh Hà Đức 2</title>
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         <pubDate>2021-11-29 01:41:20 UTC</pubDate>
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         <title>Nguyễn Thị Phương An</title>
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         <pubDate>2021-11-29 01:41:23 UTC</pubDate>
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         <title>Bích Hiền</title>
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         <pubDate>2021-11-29 01:41:28 UTC</pubDate>
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         <title>Lê Thanh Hà Đức 3</title>
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         <pubDate>2021-11-29 01:41:36 UTC</pubDate>
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         <title>Trần Nguyên Cát Tiên</title>
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         <title>Nguyễn Thị Phương An</title>
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         <pubDate>2021-11-29 01:42:29 UTC</pubDate>
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         <title>Cát Nhật 1</title>
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         <pubDate>2021-11-29 01:42:30 UTC</pubDate>
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      <item>
         <title>Trần Nguyên Cát Tiên 2</title>
         <author></author>
         <link>https://padlet.com/giapdangnamtran/kx7an6vh8c89ox71/wish/1916853857</link>
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         <pubDate>2021-11-29 01:42:54 UTC</pubDate>
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      <item>
         <title>Trần Hoàng Tuấn Bảo</title>
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         <pubDate>2021-11-29 01:43:06 UTC</pubDate>
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         <title>Nguyễn Thị Như Ngọc</title>
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         <pubDate>2021-11-29 01:43:21 UTC</pubDate>
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      <item>
         <title>Cát Nhật 2</title>
         <author></author>
         <link>https://padlet.com/giapdangnamtran/kx7an6vh8c89ox71/wish/1916854748</link>
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         <pubDate>2021-11-29 01:43:25 UTC</pubDate>
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      <item>
         <title>Nguyễn Hữu Nguyên Xuân (1)</title>
         <author></author>
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         <description><![CDATA[]]></description>
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         <pubDate>2021-11-29 01:43:46 UTC</pubDate>
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         <title>Nguyễn Hữu Nguyên Xuân (2)</title>
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         <pubDate>2021-11-29 01:44:36 UTC</pubDate>
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      <item>
         <title>Nguyễn Hữu Nguyên Xuân (3)</title>
         <author></author>
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         <pubDate>2021-11-29 01:45:22 UTC</pubDate>
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      <item>
         <title>Hoàng Thảo Vy</title>
         <author></author>
         <link>https://padlet.com/giapdangnamtran/kx7an6vh8c89ox71/wish/1916857633</link>
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         <pubDate>2021-11-29 01:45:23 UTC</pubDate>
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      <item>
         <title>Bích Hiền</title>
         <author></author>
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         <pubDate>2021-11-29 01:45:28 UTC</pubDate>
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      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/giapdangnamtran/kx7an6vh8c89ox71/wish/1916859004</link>
         <description><![CDATA[<div>Hoàng Thảo Vy (2)</div>]]></description>
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         <pubDate>2021-11-29 01:46:17 UTC</pubDate>
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      <item>
         <title>Kiều Oanh</title>
         <author></author>
         <link>https://padlet.com/giapdangnamtran/kx7an6vh8c89ox71/wish/1916859087</link>
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         <pubDate>2021-11-29 01:46:20 UTC</pubDate>
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      <item>
         <title>Tuan anh</title>
         <author></author>
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         <pubDate>2021-11-29 01:49:44 UTC</pubDate>
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      </item>
      <item>
         <title>BÀI TẬP QL TƯƠNG TÁC GEN</title>
         <author>giapdangnamtran</author>
         <link>https://padlet.com/giapdangnamtran/kx7an6vh8c89ox71/wish/1916893822</link>
         <description><![CDATA[<div><strong><br>Câu 1</strong>: Ở một loài thực vật, hai cặp alen A, a và B, b tương tác bổ trợ với nhau quy định hình dạng quả theo tỷ lệ: 9 dẹt: 6 tròn: 1 dài; alen D quy định màu đỏ trội hoàn toàn so với d quy định màu trắng. Các cặp gen nằm trên các cặp NST khác nhau. Có bao nhiêu phép lai cho tỷ lệ cây hoa đỏ, quả dẹt là 56,25%?&nbsp;<br><br></div><div><strong><br>A</strong>.3&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>B</strong>.7&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>C</strong>.9&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>D</strong>.11<br><br></div><div><strong><br>Câu 2</strong>: Ở một loài, tính trạng màu lông tuân theo qui ước sau: A-B-: màu&nbsp; đỏ; A-bb: màu tím; aaB- : màu vàng; aabb: màu trắng. Một gen lặn thứ ba khi tồn tại ở trạng thái đồng hợp (dd) gây chết tất cả các cá thể đồng hợp tử về màu tím, nhưng không ảnh hưởng đến các kiểu gen khác, gen trội hoàn toàn D không biểu hiện kiểu hình và không ảnh hưởng đến sức sống cá thể. Cho hai cá thể đều dị hợp tử về mỗi gen đem lai với nhau thu được F1. Kết luận nào sau đây đúng về khi nói về các cá thể có kiểu hình màu tím ở đời F1?&nbsp;<br><br></div><div><strong><br>A</strong>. Có 3 kiểu gen chiếm tỉ lệ 2/11.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>B</strong>. Có 6 kiểu gen qui định màu tím.&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<br><br></div><div><strong><br>C</strong>. Có 2 kiểu gen dị hợp hai cặp gen.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>D</strong>. Có 2 kiểu gen đồng hợp.<br><br></div><div><strong><br>Câu 3</strong>: Ở một loài thú, có 3 gen không alen phân li độc lập, tác động qua lại cùng quy định màu sắc lông, mỗi gen đều có 2 alen (A, a; B, b; D, d). Khi trong kiểu gen có mặt đồng thời cả 3 alen trội A, B, D cho lông xám; các kiểu gen còn lại đều cho lông trắng. Cho cá thể lông xám giao phối với cá thể lông trắng, đời con thu được 25% số cá thể lông xám. Số phép lai có thể xảy ra là:&nbsp;<br><br></div><div><strong><br>A</strong>.5&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>B</strong>.6&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>C</strong>.12&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>D</strong>.24<br><br></div><div><strong><br>Câu4</strong>: Một loài hoa có 4 thứ: 1 thứ hoa trắng và 3 thứ hoa đỏ. Cho cây hoa đỏ thứ nhất tự thụ phấn, F1 thu được 165 cây hoa đỏ, 55 cây hoa trắng. Cho cây hoa đỏ thứ hai thụ phấn, F1 thu được 135 cây hoa đỏ, 45 cây hoa trắng. Kiểu gen của hai cây hoa đỏ thứ nhất và thứ hai là:&nbsp;<br><br></div><div><strong><br>A</strong>. Aabb và aaBb.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<strong>B</strong>. Aabb và aaBB.&nbsp; &nbsp; &nbsp; &nbsp; <strong>C</strong>. AAbb và aaBb.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<strong>D</strong>. AaBb và aaBb.<br><strong><br>Câu 5</strong>: Chiều cao thân ở một loài thực vật do bốn cặp gen nằm trên NST thường quy định và chịu tác động cộng gộp theo kiểu sự có mặt một alen trội sẽ làm chiều cao cây tăng thêm 5cm. Người ta cho giao phấn cây cao nhất có chiều cao 190cm với cây thấp nhất được F1, sau đó cho F1 tự thụ phấn, nhóm cây ở F2 có chiều cao 180 cm chiếm tỉ lệ:&nbsp;<br><br></div><div><strong><br>A</strong>. 28/256.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<strong>B</strong>. 70/256.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<strong>C</strong>. 35/256.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <strong>D</strong>. 56/256.<br><br></div>]]></description>
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         <pubDate>2021-11-29 02:09:38 UTC</pubDate>
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      <item>
         <title>Trần Thị Mỹ Uyên</title>
         <author>qh3000765198</author>
         <link>https://padlet.com/giapdangnamtran/kx7an6vh8c89ox71/wish/1916917708</link>
         <description><![CDATA[<div>1. 56.25%=9/16=3/4x3/4<br>phép lai cho A-B-=3/4: AABbxAABb, AABbxaaBb tương tự với cặp Aa suy ra có 4 phép lai<br>phép ;ai cho D-=3/4 suy ra DdxDd<br>=&gt; 4 phép lai<br>56.25%=9/16*1<br>A-B-=9/16 =&gt; AaBbxAaBb<br>D-=1=&gt; DDxDD, DDxDd, DDxdd<br>=&gt;3 phép lai<br>=&gt; có 7 plai<br>2. có 2 kg quy định màu tím: AAbbDd và AabbDd<br>3. A-B-D-= 1/4=1/2x1/2x1<br>1/2x1/2x1=&gt; (Aaxaa)(Bbxbb)(DDxDD+DDxDd+DDxdd)=&gt; 9 phép lai<br>&nbsp;TH<sub>2 </sub>: Con lông đen dị hợp 3 cặp gen AaBbDd x (aabbDD ; aaBBdd ; AAbbdd)&nbsp;<br>→ 3 phép lai</div><div>Vậy số phép lai phù hợp là 12<br>4.Cây hoa đỏ thứ nhất và thứ 2 khi tự thụ phấn đều cho ra tỷ lệ KH: 3 đỏ: 1 trắng =&gt; 4 tổ hợp gen nên mỗi bên bố, mẹ cho 2 loại giao tử =&gt; 2 cây này dị hợp về một cặp gen và một cặp đồng hợp lặn<br>5.Cây cao nhất x cây thấp nhất → F1 =&gt; F1 dị hợp về 4 cặp gen quy định chiều cao<br>180cm = 190cm – 2 x 5cm<br>=&gt; cây cao 180cm có 2 alen lặn<br>=&gt; tỉ lệ cao 180cm=28/256</div><div><br><br></div>]]></description>
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         <pubDate>2021-11-29 02:25:45 UTC</pubDate>
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         <title>Ngô Thị Diệu Hiền</title>
         <author></author>
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         <pubDate>2021-11-29 02:28:10 UTC</pubDate>
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         <title>Nguyễn Thị Mỹ Châu(1)</title>
         <author></author>
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         <pubDate>2021-11-29 02:30:50 UTC</pubDate>
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         <title>Phương An 1</title>
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         <pubDate>2021-11-29 02:31:21 UTC</pubDate>
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         <title>Cát Tiên</title>
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         <pubDate>2021-11-29 02:31:26 UTC</pubDate>
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         <title>Nguyễn Thị Mỹ Châu (2)</title>
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         <pubDate>2021-11-29 02:31:34 UTC</pubDate>
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         <title>Trần Ngọc Anh Thư</title>
         <author></author>
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         <pubDate>2021-11-29 02:31:38 UTC</pubDate>
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         <title>Cát Tiên</title>
         <author></author>
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         <pubDate>2021-11-29 02:31:47 UTC</pubDate>
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         <title>Phương An 2</title>
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         <pubDate>2021-11-29 02:32:01 UTC</pubDate>
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         <title>Hoàng Thị Ánh Ngọc</title>
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         <pubDate>2021-11-29 02:32:25 UTC</pubDate>
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         <title>Phương An 3</title>
         <author></author>
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         <pubDate>2021-11-29 02:32:27 UTC</pubDate>
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         <pubDate>2021-11-29 02:33:31 UTC</pubDate>
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         <pubDate>2021-11-29 02:38:19 UTC</pubDate>
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         <pubDate>2021-11-29 02:42:23 UTC</pubDate>
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         <pubDate>2021-11-29 02:42:38 UTC</pubDate>
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