Question

Assertion (A): Human female has a perfect pair of sex chromosome.

Reason (R): Sex chromosome contributed by the human male in the zygote decides the sex of a child.

विकल्प

• 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

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

Explanation:

Human females normally have two X chromosomes (XX). In contrast, human males have one X and one Y chromosome (XY). The mix of sex chromosomes determines an individual's biological sex. Females with two X chromosomes develop reproductive anatomy and exhibit secondary sexual traits.