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date: 14 April 2021

Barr body 

Source:
The Oxford Dictionary of Sports Science & Medicine
Author(s):

Michael Kent

Particle found in the nucleus of certain non-dividing cells in the buccal epithelium of females. Barr bodies are probably derived from the inactive X-chromosome; therefore, there is one less Barr body than X-chromosomes. Females usually have one Barr body; males usually have none. Presence of Barr bodies in a buccal smear was introduced by the International Olympic Committee Medical Commission as a sex determination (gender verification) test in 1968. This test, known as the Barr test or buccal smear sex test, was responsible for excluding about one female competitor in 400 from international competition. Six female competitors failed the test in the 1984 Los Angeles Olympic games. At the 1992 Barcelona Olympics, the Barr test was replaced by the ... ...

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