How many Barr bodies does a normal human female contain in her cells?
A)0
B)1
C)2
D)3

Question

Quizplus · Accepted Answer

A Barr body is an inactive X chromosome that has been condensed and packaged into a dense structure within the nucleus. Females have two X chromosomes, but only one of them is active in any given cell. The other X chromosome is randomly inactivated and forms a Barr body, which means that a normal human female contains one Barr body in each cell. Therefore, the correct choice is B) 1.

How Many Barr Bodies Does a Normal Human Female Contain