In female mammals, the inactive X chromosome in each cell
A) can be activated if mutations occur in the active X chromosome.
B) is broken down, and its nucleotides are degraded and reused.
C) is absorbed and used in energy production.
D) becomes a Barr body.

Question

Quizplus · Accepted Answer

The inactive X chromosome in each cell of female mammals becomes a dense, inactive structure called a Barr body. This phenomenon is also referred to as X-inactivation or lyonization. The Barr body is visible in stained cells under a microscope and is a result of condensation of the inactive X chromosome. It ensures that females do not have twice the dosage of X chromosome genes as males do.

In Female Mammals, the Inactive X Chromosome in Each Cell