Cells Obtained from a Triplo-X Woman Would Contain ________ Barr

Question

Cells obtained from a Triplo-X woman would contain ________ Barr bodies.
A)0
B)1
C)2
D)3
E)4

Accepted Answer

A Triplo-X woman has three X chromosomes. The number of Barr bodies is one less than the number of X chromosomes, so she would have 2 Barr bodies.