what is barr body
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. 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.