In case of complete dominance dihybrid cross, what should be the phenotypic ratio for the cross Aabb × AaBb?
[0.7 mark]

3 : 3 : 1 : 1

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5 : 2 : 1

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2 : 1 : 1

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4 : 2 : 1 : 1

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Solution

The correct option is A 3 : 3 : 1 : 1
The given dihybrid cross is represented as follows:

The individuals showing same phenotypes are grouped as follow:

Hence, the required phenotypic ration is 3 : 3 : 1 : 1.

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