{"common":{"save":0,"post_id":"8257","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"9597","post_id":"8257","mon_id":"1159533","chapter_id":"1159673","question":"<p>Theo lý thuy\u1ebft, phép lai nào sau \u0111ây cho \u0111\u1eddi con có nhi\u1ec1u ki\u1ec3u gene nh\u1ea5t?<\/p>","options":["<strong>A. <\/strong>AaBb × Aabb","<strong>B.<\/strong> AABb × AaBB","<strong>C. <\/strong>AaBB × aabb","<strong>D.<\/strong> AABB × Aabb"],"correct":"1","level":"3","hint":"<p>\u0110\u1ec3 xác \u0111\u1ecbnh phép lai nào cho \u0111\u1eddi con có nhi\u1ec1u ki\u1ec3u gen nh\u1ea5t, b\u1ea1n c\u1ea7n xét \u0111\u1ebfn:<\/p><p>- S\u1ed1 l\u01b0\u1ee3ng alen khác nhau mà m\u1ed7i b\u1ed1 m\u1eb9 có th\u1ec3 cung c\u1ea5p.<\/p><p>- Kh\u1ea3 n\u0103ng t\u1ed5 h\u1ee3p gi\u1eefa các alen t\u1eeb b\u1ed1 và m\u1eb9.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>A. AaBb × Aabb<\/strong><\/span><\/p><p><strong>AaBb<\/strong> t\u1ea1o 4 lo\u1ea1i giao t\u1eed (AB, Ab, aB, ab).<\/p><p><strong>Aabb<\/strong> t\u1ea1o 2 lo\u1ea1i giao t\u1eed (Ab, ab).<\/p><p>S\u1ed1 ki\u1ec3u gen = 4×2=84 \\times 2 = 84×2=8.<\/p><p>Các phép lai khác có t\u1ed1i \u0111a 4 ki\u1ec3u gen, nên <strong>AaBb × Aabb<\/strong> cho nhi\u1ec1u ki\u1ec3u gen nh\u1ea5t.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2025-01-06 21:25:08","option_type":"txt","len":2},{"id":"9598","post_id":"8257","mon_id":"1159533","chapter_id":"1159673","question":"<p>Trong tr\u01b0\u1eddng h\u1ee3p gene tr\u1ed9i hoàn toàn, khi lai gi\u1eefa hai b\u1ed1 m\u1eb9 thu\u1ea7n ch\u1ee7ng, khác nhau 2 c\u1eb7p tính tr\u1ea1ng t\u01b0\u01a1ng ph\u1ea3n, sau \u0111ó F1 t\u1ef1 th\u1ee5 ph\u1ea5n, t\u1ec9 l\u1ec7 ki\u1ec3u hình c\u1ee7a F2 là:<\/p>","options":["<strong>A. <\/strong>9:3:3:1 - g\u1ed3m 4 ki\u1ec3u hình, 9 ki\u1ec3u gene","<strong>B.<\/strong> 1:1:1:1 - g\u1ed3m 4 ki\u1ec3u hình, 4 ki\u1ec3u gene","<strong>C. <\/strong>9:6:1 - g\u1ed3m 3 ki\u1ec3u hình, 9 ki\u1ec3u gene","<strong>D. <\/strong>3:1 - g\u1ed3m 2 ki\u1ec3u hình, 3 ki\u1ec3u gene"],"correct":"1","level":"3","hint":"<p>Hãy nh\u1edb l\u1ea1i \u0111\u1ecbnh lu\u1eadt phân ly \u0111\u1ed9c l\u1eadp c\u1ee7a Mendel. Trong tr\u01b0\u1eddng h\u1ee3p lai hai c\u1eb7p tính tr\u1ea1ng t\u01b0\u01a1ng ph\u1ea3n thu\u1ea7n ch\u1ee7ng, F1 s\u1ebd luôn \u0111\u1ed3ng h\u1ee3p d\u1ecb h\u1ee3p. Khi F1 t\u1ef1 th\u1ee5 ph\u1ea5n, các giao t\u1eed s\u1ebd k\u1ebft h\u1ee3p v\u1edbi nhau theo m\u1ed9t quy lu\u1eadt r\u1ea5t \u0111\u1eb7c tr\u01b0ng, cho ra t\u1ec9 l\u1ec7 ki\u1ec3u hình \u0111\u1eb7c bi\u1ec7t mà b\u1ea1n t\u1eebng h\u1ecdc.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>A. 9:3:3:1 - g\u1ed3m 4 ki\u1ec3u hình, 9 ki\u1ec3u gene<\/strong><\/span><\/p><p>- Khi lai hai b\u1ed1 m\u1eb9 thu\u1ea7n ch\u1ee7ng khác nhau 2 c\u1eb7p tính tr\u1ea1ng (P: AABB × aabb), F1 \u0111\u1ed3ng h\u1ee3p d\u1ecb h\u1ee3p (AaBb).<\/p><p>- F1 t\u1ef1 th\u1ee5 ph\u1ea5n, giao t\u1eed phân ly \u0111\u1ed9c l\u1eadp t\u1ea1o t\u1ec9 l\u1ec7 <strong>9:3:3:1<\/strong> v\u1ec1 ki\u1ec3u hình:<\/p><p>+ 9 (tr\u1ed9i c\u1ea3 hai tính tr\u1ea1ng: A-B-)<\/p><p>+ 3 (tr\u1ed9i tính tr\u1ea1ng 1, l\u1eb7n tính tr\u1ea1ng 2: A-bb)<\/p><p>+ 3 (l\u1eb7n tính tr\u1ea1ng 1, tr\u1ed9i tính tr\u1ea1ng 2: aaB-)<\/p><p>+ 1 (l\u1eb7n c\u1ea3 hai tính tr\u1ea1ng: aabb).<\/p><p>=> Có 9 ki\u1ec3u gene khác nhau trong F2.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2025-01-06 22:08:24","option_type":"txt","len":2},{"id":"9599","post_id":"8257","mon_id":"1159533","chapter_id":"1159673","question":"<p data-pm-slice=\"1 1 []\">M\u1ed9t loài th\u1ef1c v\u1eadt có A - cây cao , a - cây th\u1ea5p , B - hoa kép, b - hoa \u0111\u01a1n , DD hoa \u0111\u1ecf, Dd hoa h\u1ed3ng , dd hoa tr\u1eafng Cho giao ph\u1ea5n hai cây b\u1ed1 m\u1eb9 thu \u0111\u01b0\u1ee3c t\u1ef7 l\u1ec7 phân li ki\u1ec3u h\u1ec9nh là 6:6:3:3:3:3:2:2:1:1:1:1.Ki\u1ec3u gene c\u1ee7a b\u1ed1 m\u1eb9 trong phép lai trên?<\/p>","options":["<strong>A.<\/strong> AaBbDd × AabbDd ho\u1eb7c AaBbDd × AabbDd","<strong>B.<\/strong> AaBbDd × aaBbDd ho\u1eb7c AaBbDd × aaBbDD","<strong>C.<\/strong> AaBbDd × aaBbDd ho\u1eb7c AaBbDd × aaBbdd","<strong>D.<\/strong> AaBbDd × AabbDd ho\u1eb7c AaBbDd × aaBbDd"],"correct":"4","level":"3","hint":"<p>- Xác \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng tính tr\u1ea1ng và cách phân li d\u1ef1a trên t\u1ef7 l\u1ec7 ki\u1ec3u hình.<\/p><p>- Phân tích t\u1eebng c\u1eb7p gen và d\u1ef1 \u0111oán ki\u1ec3u gen c\u1ee7a b\u1ed1 m\u1eb9.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>D. AaBbDd × AabbDd ho\u1eb7c AaBbDd × aaBbDd<\/strong><\/span><\/p><p data-pm-slice=\"0 0 []\">A - thân cao; a - thân th\u1ea5p; B - hoa kép; b - hoa \u0111\u01a1n; DD - hoa \u0111\u1ecf; Dd - hoa h\u1ed3ng; dd - hoa tr\u1eafng.<\/p><p>Cho giao ph\u1ed1i gi\u1eefa 2 cá th\u1ec3 → 6 : 6: 3: 3: 3: 3: 2: 2: 1: 1: 1: 1 → 32 t\u1ed5 h\u1ee3p ki\u1ec3u hình; 12 ki\u1ec3u hình.<\/p><p>12 ki\u1ec3u hình = 2.2.3 (m\u1ed7i bên ph\u1ea3i t\u1ea1o các lo\u1ea1i giao t\u1eed \u0111\u1ee7 \u0111\u1ec3 t\u1ed5 h\u1ee3p thành 12 ki\u1ec3u hình - t\u1ea1o giao t\u1eed abd → aabbdd...)<\/p><p>32 t\u1ed5 h\u1ee3p giao t\u1eed = 8.4<\/p><p>Các phép lai có th\u1ec3 có: 1 bên cho 8 lo\u1ea1i giao t\u1eed AaBbDd<\/p><p>1 bên cho 4 lo\u1ea1i giao t\u1eed: AabbDd ho\u1eb7c aaBbDd.<\/p><p>V\u1eady có 2 phép lai có th\u1ec3 x\u1ea3y ra : AaBbDd × AabbDd và AaBbDd × aaBbDd<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2025-01-07 23:01:14","option_type":"txt","len":3}]}