What is the normal complement of sex chromosomes in a human male?
A)two Y chromosomes
B)two X chromosomes and one Y chromosome
C)one X chromosome and one Y chromosome
D)one Y chromosome

Question

Quizplus · Accepted Answer

A normal complement of sex chromosomes in a human male is one X chromosome and one Y chromosome. Females have two X chromosomes. The presence of two Y chromosomes (option A) is abnormal and rare, while having two X chromosomes and one Y chromosome (option B) is also abnormal and results in Klinefelter syndrome. Having only one Y chromosome (option D) is also abnormal and results in Turner syndrome.

What Is the Normal Complement of Sex Chromosomes in a Human