Barr body. Definition. noun. The small, dark-staining mass of inactive X chromosome within the nucleus of non-dividing cell. Supplement. Barr bodies are previously used as the basis for sex determination especially during the Olympics (see Barr test). Word origin: named after its discoverer Murray Llewellyn Barr, a Canadian anatomist who first identified the particle in the nucleus of neurons of female cats. Synonym: sex chromatin.
As of September 2011, there are nine Unified Combatant Commands as specified in Title 10 and the latest annual UCP. Six have regional responsibilities, and three have functional responsibilities.
Initial Review of Combatant Commands. Section 212 of Pub. L. 99â433 set out 10 areas to be covered in first review of missions, responsibilities, and force structure of unified combatant commands under subsec. (b) of this section, and directed that first report to President be made not later than Oct. 1, 1987.