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.
U.S. Africa Command has approximately 2,000 assigned personnel, including military, U.S. federal civilian employees, and U.S. contractor employees. About 1,500 work at the command's headquarters in Stuttgart, Germany. Others are assigned to AFRICOM units at MacDill Air Force Base, Florida, and RAF Molesworth, United Kingdom.