In Barr body (sex-chromatin) of a normal fema | vedclass

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Question

(D) In the somatic cells of a normal female $(XX)$,one of the two $X$-chromosomes undergoes heterochromatinization and becomes inactive during interph

Vedclass · Accepted Answer

One of the $X$-chromosomes becomes inactive and forms a Barr body near the nuclear membrane

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(D) In the somatic cells of a normal female $(XX)$,one of the two $X$-chromosomes undergoes heterochromatinization and becomes inactive during interphase. This inactive,condensed $X$-chromosome is known as the Barr body (or sex chromatin). It is typically located at the periphery of the nucleus,adjacent to the nuclear membrane. The number of Barr bodies is calculated as $(n - 1)$,where $n$ is the total number of $X$-chromosomes present. Thus,a normal female $(XX)$ has $2 - 1 = 1$ Barr body.

In Barr body (sex-chromatin) of a normal female:

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