Question

# In Drosophila, the red eye character is dominant over white eye character. When a homozygous red-eyed individual is crossed with a homozygous white-eyed individual, and individuals of F1 generation are intercrossed, 12 individuals are produced. White-eyed individuals of these will be:

A

3

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B

6

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C

9

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D

12

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Solution

## The correct option is A 3 It is a monohybrid cross. Monohybrid cross produces progeny of F2 generation in ratio 3:1 where 1 is the ratio of recessive progeny. Here in, the number of recessive white-eyed individuals can be found by: Total number according to ratio = 3+1 = 4. Total number of individuals produced actually = 12 Number of white-eyed individuals = 14×12=3

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