Question

Xác định tỉ lệ kiểu gen của các phép lai sau : a, P. AaBB × AaBB b, P. AaBb × aaBb c, P. AaBb × aabb d, P. AaBb × AaBb

Answer 1

a) P: AaBB x AaBB

G(P): 1/2AB:1/2aB__1/2AB:1/2aB

F1: 1/4AABB:2/4AaBB:1/4aaBB

b) P: AaBb      x     aaBb

Tách:(Aa x aa) x (Bb x Bb)

F1: 1/8AaBB:2/8AaBb:1/8Aabb:1/8aaBB:2/8aaBb:1/8aabb

 

c) P: AaBb   x aabb

G(P):1/4AB:1/4Ab:1/4aB:1/4ab__ab

F1: 1/4AaBb:1/4Aabb:1/4aaBb:1/4aabb

d) P: AaBb x AaBb

Tách: (Aa x Aa) x (Bb x Bb)

F1: 1/16 AABB:2/16AaBB:2/16AABb:4/16AaBb:1/16aaBB:2/16aaBb:1/16AAbb:2/16Aabb:1/16aabb