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Q.

Observe the following diagram related to genotype of Drosophila and what is the phenotype of the organism.

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a

It is female with yellow body and red eyes.

b

It is female with yellow body and white eyes

c

It is male with yellow body and red eyes

d

It is male with Brown body and red eyes

answer is A.

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Detailed Solution

The figure shows that both chromosomes are X chromosomes because Y chromosome is hook like at one of the ends. The genotype is yy w+w. it shows that the body of the female Drosophila is yellow colored and eye color is heterozygous with one dominant allele for red eyes as w+. It is F2 recombinant among the females in dihybrid cross with respect to body and eye color.
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Observe the following diagram related to genotype of Drosophila and what is the phenotype of the organism.