Barr body
noun Etymology: Murray Llewellyn Barr died 1995 Canadian anatomist Date: 1961 a densely staining inactivated condensed X chromosome that is present in each somatic cell of most female mammals and is used as a test of genetic femaleness (as in a fetus) — called also sex chromatin

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • Barr body — [bär] n. [after M. L. Barr (1908 95), Cdn anatomist] a structure found on the inside of the nuclear membrane of female cells that takes a dark stain and indicates by its presence the sex of the individual …   English World dictionary

  • Barr body — Barr body. = sex chromatin (см.). (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Barr body — Barr body. См. половой хроматин. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Barr body — Nucleus of a female amniotic fluid cell. Top: Both X chromosome territories are detected by FISH. Shown is a single optical section made with a confocal microscope. Bottom: Same nucleus stained with DAPI and recorded with a CCD camera. The Barr… …   Wikipedia

  • Barr body — A microscopic feature of female cells due to the presence of two X chromosomes in the female. One of these X chromosomes is inactive and is crumpled up to form the Barr body. * * * Barr body bär n a densely staining inactivated condensed X… …   Medical dictionary

  • Barr body — Barr′ bod y [[t]bɑr[/t]] n. gen an inactiveXchromosome present in the nuclear membrane of female somatic cells, used for verifying the sex of an individual • Etymology: 1960–65; after Murray L. Barr (born 1908), Canadian physician …   From formal English to slang

  • Barr body — /bahr/ 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. Also called sex chromatin. [1960… …   Universalium

  • Barr body — inactivated X chromosome (for Murray L Barr) …   Eponyms, nicknames, and geographical games

  • Barr body — noun Physiology a densely staining structure in the cell nuclei of females, consisting of a condensed, inactive X chromosome and regarded as diagnostic of genetic femaleness. Origin 1960s: named after the Canadian anatomist M. L. Barr …   English new terms dictionary

  • Barr body — see sex chromatin [M. L. Barr (1908–95), Canadian anatomist] …   The new mediacal dictionary

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