Question
Science Question on Heredity and Evolution
Assertion (A): Human female has a perfect pair of sex chromosomes.
Reason (R): Sex chromosome contributed by the human male in the zygote decides the sex of a child.
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.
Answer
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
Explanation
Solution
Human females have two identical sex chromosomes (XX). The sex of a child is determined by the sex chromosome (X or Y) contributed by the male, but this does not directly explain the**”perfect pair”** in females.