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Barr body


What is BARR BODY? What does BARR BODY mean? BARR BODY meaning, definition & explanation


Barr Body, The Whole Story


Barr body is known as sex chromatin. Sex chromatin is formed from the genetic inactivation of human


Number of Barr body present in a female child with down syndrome


Barr body is found in the nucleus during

A Barr body 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 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. This happens early in embryonic development at random in mammals, except in marsupials and in some extra-embryonic tissues of some placental mammals, in which the father's X chromosome is always deactivated.
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