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Question

The offspring of AA bb × aa BB is crossed with, aabb. The genotypic ratio of progeny will be

A
9 : 3 : 3 : 1
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B
1 : 2 : 1
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C
1 : 1 : 1 : 1
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D
4 : 1
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Solution

The correct option is B 1 : 1 : 1 : 1

The cross is made between AAbb to aaBB. The progeny formed shows the genotype AaBb. This progeny is crossed with aabb. The genotypes of the progeny are 4 AaBb, 4Aabb, 4aaBb, 4aabb. The genotypic ratio is 1:1:1:1.

So, the correct option is ‘1:1:1:1’.

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