Barr body


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Related to Barr body: Pseudoautosomal region

Barr body

[′bär ‚bäd·ē]
(cell and molecular biology)
A condensed, inactivated X chromosome inside the nuclear membrane in interphase somatic cells of women and most female mammals. Also known as sex chromatin.
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At the appropriate time in development, they appear to coat the entire length of one of the X chromosomes, which then condenses into a Barr body.