- Kieugen 0,2AAbb khi tir phoi thi den F2, se sinh ra kieugen AAbb voi tile
dthe he F4, lay nglu nhie n3 cay c6 qua to, xac suit k thu ugc 2 cay th u^ chung la bao nhieu?
Bai 2. The he xuat phat cua mot quan the t u phoi c6 t i le kieu gen la 0,4Aa : 0,6aa.
O the he F 3 , lay ngau nhien 3 ca the, xac suat de thu dugc 1 ca the mang gen a la bao nhieu?
Bai 3. C) mot loai thuc vat, gen A quy dinh than cao troi hoan toan so v a i alen a
quy dinh than thap. The he xuat phat cua mot quan the t u phoi c6 t i le kieu gen la 0,2AA : 0,4Aa : 0,4aa. O the he F2, lay ngau nhien 5 cay, xac suat de thu dugc 2 cay than cao la bao nhieu?
Bai 4. Ci mot loai thuc vat, gen A quy dinh qua to troi hoan toan so vai alen a quy dinh
qua nho. The he xuat phat cua mot quan the t u ph6i c6 t i le k i l u gen la 100%Aa.
d the he F4, lay n g l u nhien 3 cay c6 qua to, xac suit dk thu dugc 2 cay t h u ^ chung la bao nhieu? la bao nhieu?
Bai 5. O mot loai thuc vat sinh san bang t u thu phan, gen A quy dinh than cao troi
hoan toan so v a i a quy dinh than thap. The he xuat phat cua mot quan the c6 t i le kieu hinh 4 cay than cao : 1 cay than thap. Ci the he F 3 , t i le k i l u hinh la 9 cay than cao : 11 cay than thap. Lay ngau nhien 2 cay than cao a F 3 , xac sukt
de thu dugc 1 cay thuan chung la bao nhieu?
Bai 6. 0 mot loai thuc vat sinh san bang t u thu phan, gen A quy dinh nhieu qua
troi hoan toan so v a i a quy din it qua. The he xuat phat cua mot quan the c6 t i le kieu hinh 9 cay nhieu qua : 1 cay it qua. C5 the he F2, t i le kieu hinh la 3 cay nhieu qua : 1 cay it qua. Lay ngau nhien 3 cay a F2, xac suat dd thu dugc 1 cay than cao thuan chung la bao nhieu?
Bai 7. The he xuat phat cua mot quan the t u phoi c6 cau true di truyen la
(),1AABB + 0,lAaBB + 0 , l A A Bb + 0,4AaBb + 0 , l A A b b +0,lAabb + 0,laabb = 1.
d F2, lay ngau nhien 3 ca the, xac suat de thu dugc 2 ca the c6 k i l u gen AaBb la bao nhieu?
Bai 8. The he xuat phat cua mot quSn Xhk t u ph6i c6 cku tnic di truy6n la
0.25AABB + 0,1 AaBb + 0 , l A A b b + 0,3Aabb + 0,laaBb + 0,15aabb =1.6 ¥2,
Bai 9. CJ mot loai thuc vat, gen A quy dinh than cao troi hoan toan so voi alen a
quy dinh than thap; Gen B quy dinh hoa do troi hoan toan so voi alen b quy dinh hoa trang; hai cap gen nay nam tren 2 cap NST khac nhau. The he xuat
phat ciia mot quhn t h i tu ph6i c6 ciu true di truyen la 0,1AABB + 0,lAaBB +
0,2AABb + 0,lAabb + 0,15aaBB + 0,15aaBb + 0,2aabb =1.6 Fj, liy ngau
nhien 5 ca thi , xac su4t de thu dugc 3 ca th6 than cao, hoa do thuSn chung la bao nhieu?
Bai 10. Cho biet tinh trang mau hoa do 2 cap gen Aa va Bb nSm tren 2 cap NST
tuong tac theo kieu bo sung. Khi trong kieu gen c6 ca A va B thi c6 hoa do ;
Khi chi CO mot gen troi A hoac B thi c6 hoa vang ; Kieu gen dong hop Ian c6
hoa trang. The he xuat phat cua mot quan the tu phoi c6 0,2AABB + 0,lAABb + 0,lAaBb + 0,2Aabb + 0,laaBB + 0,15aaBb + 0,15aabb = 1. CJ F2, l i y ngau nhien 3 cay, xac suat de thu dugc 2 cay hoa trang la bao nhieu?