A boy inherits his X chromosome from
A) his father.
B) his mother.
C) either his father or his mother.
D) both his father and his mother.

Question

Quizplus · Accepted Answer

A boy inherits his X chromosome from his mother. This is because females have two X chromosomes, while males have one X and one Y chromosome. During fertilization, the mother can only pass down one of her X chromosomes to her son, while the father can pass down either his X or Y chromosome. Therefore, the X chromosome inherited by a male child can only come from his mother.

A Boy Inherits His X Chromosome from