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Dihybrid Cross

Number of gen...

Question

Number of genotypes found in $F_{2}$ progeny of a dihybrid cross is

A

9

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B

6

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C

3

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D

1

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Solution

The correct option is A 9

When a cross is made between AABB x aabb. It is called dihybrid cross. In this cross, in F2 generation the genotypic ratio is AABB – 1 AABb – 2 AaBB – 2, AaBb – 4 AAbb – 1, Aabb – 2, aaBB – 1,aaBb – 2 aabb – 1. So, in the F2 generation, 9 types of genotypes are obtained.
So, the correct option is ‘9’.

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