Đột biến nhiễm sắc thể

Home Lớp 9 Khoa học tự nhiên 9 - sách kết nối tri thức Bài 46: Đột biến nhiễm sắc thểBài tập trung bình

{"common":{"save":0,"post_id":"8712","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"10707","post_id":"8712","mon_id":"1159533","chapter_id":"1159701","question":"Kí hi\u1ec7u b\u1ed9 NST nào sau \u0111ây dùng \u0111\u1ec3 ch\u1ec9 có th\u1ec3 3 nhi\u1ec5m?<\/p>","options":["A. 2n + 1.","B. 2n – 1.","C. 2n + 2.","D. 2n – 2."],"correct":"1","level":"2","hint":"Th\u1ec3 ba nhi\u1ec5m (trisomy)<\/strong> là d\u1ea1ng \u0111\u1ed9t bi\u1ebfn s\u1ed1 l\u01b0\u1ee3ng nhi\u1ec5m s\u1eafc th\u1ec3<\/strong>, trong \u0111ó m\u1ed9t c\u1eb7p nhi\u1ec5m s\u1eafc th\u1ec3 có thêm 1 chi\u1ebfc<\/strong>.<\/p>","answer":"\u0110áp án \u0111úng: A. 2n + 1.<\/strong><\/p>Th\u1ec3 ba nhi\u1ec5m (trisomy)<\/strong> là tr\u01b0\u1eddng h\u1ee3p m\u1ed9t c\u1eb7p NST có thêm 1 chi\u1ebfc<\/strong>, nên t\u1ed5ng s\u1ed1 NST là 2n + 1<\/strong>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2025-04-02 11:19:48","option_type":"txt","len":2},{"id":"10708","post_id":"8712","mon_id":"1159533","chapter_id":"1159701","question":"S\u1ed1 NST trong t\u1ebf bào là th\u1ec3 3 nhi\u1ec5m \u1edf ng\u01b0\u1eddi là:<\/p>","options":["A. 47 chi\u1ebfc NST.","B. 47 c\u1eb7p NST.","C. 45 chi\u1ebfc NST.","D. 45 c\u1eb7p NST."],"correct":"1","level":"2","hint":"S\u1ed1 nhi\u1ec5m s\u1eafc th\u1ec3 \u1edf ng\u01b0\u1eddi bình th\u01b0\u1eddng là 46 chi\u1ebfc<\/strong>. Th\u1ec3 ba nhi\u1ec5m ngh\u0129a là có m\u1ed9t c\u1eb7p nào \u0111ó có thêm 1 chi\u1ebfc<\/strong>.<\/p>","answer":"\u0110áp án \u0111úng: A. 47 chi\u1ebfc NST.<\/strong><\/p>- Ng\u01b0\u1eddi bình th\u01b0\u1eddng có 46 chi\u1ebfc NST<\/strong> (t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 23 c\u1eb7p<\/strong>).<\/p>- Th\u1ec3 ba nhi\u1ec5m (trisomy)<\/strong> là tình tr\u1ea1ng m\u1ed9t c\u1eb7p NST có thêm 1 chi\u1ebfc<\/strong>, t\u1ed5ng s\u1ed1 NST lúc này là 47 chi\u1ebfc<\/strong>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2025-04-02 11:22:59","option_type":"txt","len":2},{"id":"10709","post_id":"8712","mon_id":"1159533","chapter_id":"1159701","question":"Kí hi\u1ec7u b\u1ed9 NST d\u01b0\u1edbi \u0111ây \u0111\u01b0\u1ee3c dùng \u0111\u1ec3 ch\u1ec9 th\u1ec3 2 nhi\u1ec5m là<\/p>","options":["A. 3n.","B. 2n.","C. 2n + 1.","D. 2n – 1."],"correct":"2","level":"2","hint":"B\u1ed9 NST bình th\u01b0\u1eddng c\u1ee7a sinh v\u1eadt l\u01b0\u1ee1ng b\u1ed9i có 2 b\u1ed9 NST \u0111\u01a1n<\/strong> (m\u1ed9t t\u1eeb b\u1ed1, m\u1ed9t t\u1eeb m\u1eb9).<\/p>Nó \u0111\u01b0\u1ee3c kí hi\u1ec7u là 2n<\/strong>.<\/p>N\u1ebfu b\u1ecb \u0111\u1ed9t bi\u1ebfn t\u0103ng ho\u1eb7c gi\u1ea3m m\u1ed9t chi\u1ebfc<\/strong> trong m\u1ed9t c\u1eb7p NST, khi \u0111ó m\u1edbi là th\u1ec3 l\u1ec7ch b\u1ed9i<\/strong>.<\/p>","answer":"\u0110áp án \u0111úng: B. 2n.<\/strong><\/p>2n<\/strong>: B\u1ed9 NST bình th\u01b0\u1eddng<\/strong>, có \u0111\u1ea7y \u0111\u1ee7 t\u1eebng c\u1eb7p.<\/p>3n<\/strong>: Th\u1ec3 tam b\u1ed9i<\/strong>, có 3 b\u1ed9 NST<\/strong>, thu\u1ed9c \u0111\u1ed9t bi\u1ebfn \u0111a b\u1ed9i.<\/p>2n + 1<\/strong>: Th\u1ec3 ba (trisomy)<\/strong>, có thêm 1 NST<\/strong> → \u0110\u1ed9t bi\u1ebfn l\u1ec7ch b\u1ed9i.<\/p>2n - 1<\/strong>: Th\u1ec3 m\u1ed9t (monosomy)<\/strong>, m\u1ea5t 1 NST<\/strong> → \u0110\u1ed9t bi\u1ebfn l\u1ec7ch b\u1ed9i.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2025-04-02 11:26:57","option_type":"txt","len":2}]}