Barr body

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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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References in periodicals archive ?
When scoring Barr bodies in cells of the buccal mucosa, only peripherally located Barr bodies should be considered.
The sex chromatin (or buccal smear) test, which requires the identification of Barr bodies during microscopic examination of cells scraped from the inner lining of the athlete's cheek, was developed and first introduced during the 1968 Mexico City Olympic Games.
Blood and tissue components include sex chromosomes, Barr bodies (or sex chromatin) and the Sty gene (sex-determining region of the Y-chromosome; Davidson and Smith, 1954; Davidson, 1960, 1966; Eberle, 1967; Foster et al.
The dark masses, now known as Barr bodies, were pieces of chromatin--the amalgamation of DNA and protein that makes up chromosomes.