A Barr body is normally found in the nucleus of which kind of human cell?
A)Unfertilized egg cells only
B)Sperm cells only
C)Somatic cells of a female only
D)Somatic cells of a male only
E)Both male and female somatic cells

Question

Quizplus · Accepted Answer

A Barr body is an inactive X chromosome that can be found in the nucleus of somatic cells of a female. It is formed during embryonic development, when one of the two X chromosomes is randomly inactivated to compensate for the genetic dosage difference between males and females. Sperm cells and unfertilized egg cells contain only one copy of the X chromosome and do not form Barr bodies. Male somatic cells have only one X chromosome, which is not subject to X-inactivation, and also do not contain Barr bodies.

A Barr Body Is Normally Found in the Nucleus of Which