NEET Questions Solved

AIIMS - 2001

Barr body is found in the cytoplasm during

(a) interphase in cell of female mammal.
(b) interphase in cell of male mammal.
(c) prophase in cell of female mammal.
(d) prophase in cell of male mammal.

(a) : Barr body is also known as sex chromatin, X chromatin. Barr body is partially inactivated and development of this facultative heterochromatin occurs in one of the two X chromosomes in interphase nuclei. Any of the two X-chromosomes can become heterochromatic.

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