Question

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

• A. 3 : 1
• B. 7 : 1
• C. 1 : 1
• D. 2 : 1

Answer 1

The correct option is C 1 : 1

• Heterozygosity of sex-linked genes will not change the proportion of male-specific chromosomes entering the egg cell. The phenomenon of male chromosomes entering the egg cell remains independent of the heterozygosity of sex-linked genes. So, both types of sex chromosomes of male fruit flies have an equal possibility of entering into the egg cell.
  
• Thus the correct answer is option C