Question

Lập các SĐL( di truyền liên kết liên quan đến 2 cặp gen A a và B b) để F1 có tỉ lệ KH:

- 100%

- 3: 1

- 1: 1

- 1: 2: 1

Answer 1

-100 % :

P : \(\dfrac{AB}{AB}\) x \(\dfrac{ab}{ab}\)

Gp : \(\overset{AB}{-}\) \(\overset{ab}{-}\)

F1 :\(\dfrac{AB}{ab}\) (100%......)

- 1:1:

P : \(\dfrac{AB}{ab}\) x \(\dfrac{ab}{ab}\)

Gp : \(\overset{AB}{-}\) , \(\overset{ab}{-}\) \(\overset{ab}{-}\)

F1 :\(\dfrac{AB}{ab}\) , \(\dfrac{ab}{ab}\)

1:2:1:

P : \(\dfrac{AB}{ab}\) x \(\dfrac{AB}{ab}\)

Gp : \(\overset{AB}{-}\) , \(\overset{ab}{-}\) \(\overset{ab}{-}\) , \(\overset{AB}{-}\)

F1 :\(\dfrac{AB}{ab}\) , \(\dfrac{ab}{ab}\) , \(\dfrac{AB}{ab}\) , \(\dfrac{AB}{AB}\)

1 \(\dfrac{AB}{AB}\) : 2 \(\dfrac{AB}{ab}\) :1 \(\dfrac{ab}{ab}\)