A Barr body in a mammalian female cell represents a(n)

A) inactivated oocyte.
B) polar body.
C) degenerate nucleus.
D) inactivated X chromosome.
E) inactivated Y chromosome.

Barr Body

A condensed and inactivated X chromosome appearing as a distinctive dense spot in the interphase nucleus of certain cells of female mammals.

Mammalian Female Cell

A cell within a female mammal, which may be specialized, such as an ovum, or somatic, like those forming tissues and organs.

Inactivated X Chromosome

Also known as the Barr Body; a dense body formed from a deactivated X chromosome found in the nuclei of female cells, ensuring dosage compensation between males and females.