what are bar bodies
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it is bar or barr??????????
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A Barr body (named after discoverer Murray Barr)[1] is the inactive X chromosome in a female somatic cell,[2] 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. The Lyon hypothesis states that in cells with multiple X chromosomes, all but one are inactivated during mammalian embryogenesis.[3] This happens early in embryonic development at random in mammals,[4] except in marsupials and in some extra-embryonic tissues of some placental mammals, in which the father's X chromosome is always deactivated.[5]
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