A Barr body is typically found in the nucleus of
A Barr body is the inactivated X chromosome that is usually found in the nuclei of female somatic cells.It can also occur in males when there is an abnormality and the male is XXY instead of the normal XY, a condition known as Klinefelter's syndrome. In this case, the male somatic cells would also contain a Barr body.s the cells develop, the inactivated X chromosome is compacted into an inert bundle called a Barr body. Since males have one X and one Y, no inactivation takes place, so there is, in general, no Barr body found in the nucleus of somatic cells in male mammals. Answer by Farah ramadan. Confidence votes 43. A Barr body is the inactivated X chromosome that is usually found in the nuclei of female somatic cells. It can also occur in males when there is an abnormality and the male is XXY instead of the normal XY, a condition known as Klinefelter's syndrome.In this case, the male somatic cells would also contain a Barr body.s the cells develop, the inactivated X chromosome is compacted into an inert bundle called a Barr body. Since males have one X and one Y, no inactivation takes place, so there is, in general, no Barr body found in the nucleus of somatic cells in male mammals. Best Answer: Barr body The condensed, single X-chromosome, appearing as a densely staining mass, that is found in the nuclei of somatic cells of female mammals. It is named after its discoverer, Murray Barr, and is derived from one of the two X-chromosomes which becomes inactivated.n the case of the former, the male possesses a Barr body that it would normally not have, and in the latter case the Barr body is absent. Females usually have one Barr body; males usually have none. Report Abuse. See the explained details of Barr Body. Barr body-The condensed, single X-chromosome, appearing as a densely staining mass, that is found in the nuclei of somatic cells of female mammals.It is named after its discoverer, Murray Barr, and is derived from one of the two X-chromosomes which becomes inactivated.n the case of the former, the male possesses a Barr body that it would normally not have, and in the latter case the Barr body is absent. Females usually have one Barr body; males usually have none. The inactivation occurs early in development when the embryo consists of only a few cells. The inactivation is random – one X chromosome may be turned off in one cell and the other X chromosome inactivated in a neighboring cell.Once a chromosome is turned off it remains turned off in all descendent cells. With respect to their X chromosomes, female mammals are chimeras.A chimera is an organism composed of different genotypes. Some areas of their bodies have one X chromosome turned off and other areas have the other X chromosome inactivated.An example of X-linked chimeras that can be seen visually are female cats that are heterozygous at the orange coat color locus. Orange is a locus on the X chromosome.ome areas of their bodies have one X chromosome turned off and other areas have the other X chromosome inactivated. An example of X-linked chimeras that can be seen visually are female cats that are heterozygous at the orange coat color locus. Orange is a locus on the X chromosome. A Barr body (named after discoverer Murray Barr) is the inactive X chromosome in a female somatic cell, rendered inactive in a process called lyonization, in those species in which sex is determined by the presence of the Y (including humans) or W chromosome rather than the diploidy of the X or Z.eft: DAPI stained female human fibroblast with Barr body (arrow). Right: histone macroH2A1 staining. Arrow points to sex chromatin in DAPI-stained cell nucleus, and to the corresponding sex chromatin site in the histone macroH2A1-staining. As the cells develop, the inactivated X chromosome is compacted into an inert bundle called a Barr body. Since males have one X and one Y, no inactivation takes place, so there is, in general, no Barr body found in the nucleus of somatic cells in male mammals.s the cells develop, the inactivated X chromosome is compacted into an inert bundle called a Barr body. Since males have one X and one Y, no inactivation takes place, so there is, in general, no Barr body found in the nucleus of somatic cells in male mammals. As the cells develop, the inactivated X chromosome is compacted into an inert bundle called a Barr body. Since males have one X and one Y, no inactivation takes place, so there is, in general, no Barr body found in the nucleus of somatic cells in male mammals.8 people found this useful.ince males have one X and one Y, no inactivation takes place, so there is, in general, no Barr body found in the nucleus of somatic cells in male mammals. A typical human female has only one Barr body per somatic cell, while a typical human male has none. Mammalian X-chromosome inactivation is initiated from the X inactivation centre or Xic, usually found near the centromere.eft: DAPI stained female human fibroblast with Barr body (arrow). Right: histone macroH2A1 staining. Arrow points to sex chromatin in DAPI-stained cell nucleus, and to the corresponding sex chromatin site in the histone macroH2A1-staining. A small, condensed mass of the inactivated X-chromosome usually located just inside the nuclear membrane of the interphase nucleus; the number of sex chromatin bodies per nucleus is one less than the number of X-chromosomes; hence, normal males have none and normal females have one.he substance of the chromosomes, composed of DNA and basic proteins (histones), the material in the nucleus that stains with basic dyes. sex chromatin the persistent mass of the material of the inactivated X chromosome in cells of normal females; called also Barr body.
Female somatic cell