Question

Males are homozygous or heterozygous for

• A. Y - linked genes
• B. X - linked genes
• C. X, Y - linked genes
• D. They cannot be either homozygous or heterozygous for sex-linked genes

Answer 1

The correct option is A Y - linked genes

Males have XY genotype which means that they cannot be homozygous or heterozygous for either X or Y linked genes. This is a confusing and misleading term which is not possible for human males but only for females in case of sex-linked traits.

So the correct answer is 'they cannot be either homozygous or heterozygous for sex-linked genes'.