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

Options

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

Answer

A

Explanation

Genes which are present on sex chromosomes are called sex linked genes. Male Drosophila contains XY sex chromosome, while female contains XX-chromosomes.
During gamete formation male produces 50% male specific gametes and 50% female specific gametes while female produces only one type of gametes, i.e. female specific. As male produces two types of gametes in equal proportion. There is an equal opportunity to getting a male or female offspring.