Question

A fruit fly is heterozygous for sex-linked genes, when mated with normal female fruit fly, the males specific chromosome will enter egg cell in which proportion?

• A. 1:1
• B. 2:1
• C. 3:1
• D. 7:1

Answer 1

Answer: (A)

1:1

Heterozygosity of sex linked genes will not change the proportion of male specific chromosome entering the egg cell. The phenomenon of male chromosome entering the egg cell remains independent of the heterozygosity of sex linked genes. So, both types of sex chromosomes of male fruit fly have equal possibility of entering into the egg cell.