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  1. In a dihybrid cross AABB × aabb, F2 progeny of AABB, AABb, AaBB and AaBb occurs in the ratio of
    1. 1: 1: 1: 1
    2. 9: 3: 3: 1
    3. 1: 2: 2: 1
    4. 1 :2: 2: 4
Correct Option: D

Genotype is the genetic make up of an organism. The given 4 genotypes are present in 1: 2: 2: 4 ratio.



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