Assertion(A): Gamete disseminated by the male determines whether the child produced will be male or female in Homo sapiens.
Reason (R): Some genes on X-chromo some and Y-chromosomes determine the gender of the progeny. Its a polygenic trait.

Options

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true

Answer

C

Explanation

Sex chromosomes in human female are XX and in human male are XY. The male produces X and Y chromosomes containing gametes, while females produce only X-containing gametes. Therefore, males determine the sex of offspring. Sex in humans is a monogenic trait as its decided by a single gender.