Question

The question consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

• 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.
  Assertion (A): In birds, the sex of the offspring is determined by males.
  Reason (R): Males are homogametic while females are heterogametic.

Hint:

The sex determination system in birds is opposite to that of humans, where males determine the sex of the offspring.

Answer 1

The Correct Option is D

In avian species, females are heterogametic (ZW) while males are homogametic (ZZ). Therefore, the sex of the offspring is determined by the female parent and not by the male.