Human Genetics Problem Set

Problem 14: Barr body

Correct!

A Barr body is:

A.	the cause of Down's syndrome
B.	an amplified gene
C.	a polytene chromosome
D.	a ribonucleoprotein particle
E.	an inactivated X chromosome One of the two X chromosomes in female somatic cells is visualized as a densely staining body within the nucleus known as a "Barr body."