Question

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

• 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.

Hint:

In birds, females determine the sex of the offspring because they have two different sex chromosomes (ZW), unlike males (ZZ).

Answer 1

The Correct Option is D

- In birds, the sex of the offspring is determined by females, not males. 
- Female birds are heterogametic (ZW), while males are homogametic (ZZ). 
- Therefore, (A) is false, but (R) is true.