A human cell with two Barr bodies and no Y chromosome is from

Question

Quizplus · Accepted Answer

A Barr body is an inactivated X chromosome. Females have two X chromosomes, but one of them is inactivated during development to prevent an overdose of X-linked gene expression. Therefore, a female with three X chromosomes would have two Barr bodies, while a normal female would have one. A male with two X chromosomes would not have any Barr bodies since only one X chromosome is active in males. A male with no Y chromosome would not develop as male, but would have only one X chromosome and no Barr bodies.

A Human Cell with Two Barr Bodies and No Y