Principles of Inheritance and Variation Question 85
85. A fruit fly is heterozygous for sex-linked genes. When mated with a normal female fruit fly, the male-specific chromosome will enter egg cells in the proportion of
(a) $1: 1$
(b) $1: 2$
(c) $3: 1$
(d) $7: 1$
Show Answer
Answer : a
Hints & Solution
(a) In sex determination, the male specific chromosome will have half as much chance as the other to enter the egg cell. Hence the proportion will be $1: 1$.
