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Q.

If F2 progeny of dihybrid cross, the expected genotypic proportions of individuals homozygous for both dominant character is:

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a

3/16

b

12/16

c

1/16

d

9/16

answer is D.

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Detailed Solution

Solution: In typed dihybrid cross, the proportions of genotypes are

YYRR – 1         YYrr – 1

 YyRR – 2          Yyrr – 2

YYRr – 2           yyRr – 1

 YyRr – 4            yyRr – 2

Individuals homozygous for both dominant character are 1/16

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