Question

The dihybrid ratio in F2 - generation is

(a) 1 : 1 : 1 : 1

(b) 2 : 1 : 2 : 1

(c) 3 :1

(d) 9 : 3 : 3 : 1

Answer 1

Correct option: (d) 9 : 3 : 3 : 1

Explanation:

When a pair of contrasting characters are studied during hybridization, it is called dihybrid cross. In F2 -generation, its ratio is 9 : 3 : 3 : 1.

It means when parents having –

Yellow, round Crossed with green wrinkled

seeds seeds

(IIRR) × (iirr)

will give 9 – Yellow round seeds.

3 – Yellow wrinkled seeds.

3 – Green round seeds.

1 – Green wrinkled seeds