Question

Assertion (A): In birds the sex of the offspring is determined by males.

Reason (R): Males are homogametic while females are heterogametic.

Options

• Both (A) and (R) are true and (R) is the correct explanation of (A).

• Both (A) and (R) are true, but (R) is not the correct explanation of (A).

• (A) is true, but (R) is false.

• (A) is false, but (R) is true.

Answer 1

(A) is false, but (R) is true.

Explanation:

Most birds have heterogametic females (labelled as Z W) and homogametic males (marked as Z Z). The sex of the kid is determined by the female's contribution of the Z (male) or W (female) chromosomes.