(thing) by Eraser_ Sun Nov 05 2000 at 21:38:16
sex chromatin: a spot that shows up when stained on the nucleus of cells taken from mammalian females, but not males, and is attributed to the inactivated second X chromosome; it is also called the Barr body (named after Murray L. Barr, 1908-).

Dictionary of Sexology Project: Main Index

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