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Q.

The number of different genotypes observed in the F2 -generation of a dihybrid cross are

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a

9

b

12

c

4

d

6

answer is A.

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Detailed Solution

The genotypic ratio of a dihybrid cross is 1:2:1:2:4:2:1:2:1. Thus, we see that 9 different genotypes are observed in the F2-generation.

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The number of different genotypes observed in the F2 -generation of a dihybrid cross are