sex chromatin


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Related to sex chromatin: Barr body

sex chromatin

n.

Barr′ bod`y

(bɑr)
n.
an inactive Xchromosome present in the nuclear membrane of female somatic cells, used for verifying the sex of an individual.
[1960–65; after Murray Latin. Barr (born 1908), Canadian physician]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sex chromatin - chromatin found only in female cells; "the presence or absence of sex chromatin in cells obtained by amniocentesis makes it possible to determine the sex of a fetus"
chromatin, chromatin granule - the readily stainable substance of a cell nucleus consisting of DNA and RNA and various proteins; during mitotic division it condenses into chromosomes
References in periodicals archive ?
Sex chromatin seen as darkly staining mass at the nucleus of all non-dividing cells of genotypically females represents the heterochromatin of the inactivated X-chromosome.
Chromosomal abnormalities are explained early on, but later, as we hear about Barr's doubts about his sex chromatin test and about limitations of PCR testing, we need more.
Lepidopteran females display a heterochromatic body in the interphase nuclei (reviewed in Traut & Marec 1996) also called sex chromatin body, which is derived from the W chromosome (Traut et al.
Determination of sex in the Inter--sex persons--sex determination in the living inter sex state can be done by sex chromatin examination.
Postmeiotic sex chromatin in the male germline of mice.
According to some authors, these appendages are assumed to be constituted of sex chromatin derived from heterochromatin proportions of the XX chromosome complex (3), (4).
The assessment of the sex chromatin in animals is based on the premise that it represents the sexual status (XX and XY) chromosomes of a particular animal.
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.