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Barr body

[ bahr ]
/ bɑr /
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noun
a condensed, inactivated X chromosome present in most female mammals in the nuclei of all cells except the germ cells: used, as in sports competitions, to verify that an individual is genetically female.
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Also called sex chromatin.

Origin of Barr body

First recorded in 1960–65; named after Murray L. Barr (1908–88), Canadian physician
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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