Question

Assertion (A) In humans, the gamete contributed by the male determines whether the child produced will be male or female.
Reason (R) Sex in humans is a polygenic trait, depending upon a cumulative effect of some genes on X-chromosome.

• A. If both A and R are true and R is the correct explanation of the A
• B. If both A and R are true, but R is not the correct explanation of the A
• C. If A is true, but R is false
• D. If A is false, but R is true

Answer 1

Answer: (C)

Assertion is true, Reason is false. It can be corrected as In human, the gametes contributed by the male determines the sex of the child. Thus, sex in human is a polygenic trait depending upon a cumulative effect of some genes present on Y-chromosome and not on X-chromosome.