Origins of Hutu, Tutsi and Twa phenotype, genotype, cultural memory of inhabitants of Rwanda, archeology, and linguistics. Most Tutsis and Hutus carry the E1b1a paternal haplogroup, which is common among Bantu populations. More recent studies have de-emphasized physical appearance, such as height and nose width, in favor of examining blood factors, the presence of the sickle cell trait, lactose intolerance in adults, and other genotype expressions. Excoffier et al. (1987) found that the Tutsi and Hima, despite being surrounded by Bantu populations, are "closer genetically to Cushites and Ethiosemites". Another study concluded that, while the sickle cell trait among the Rwandan Hutu was comparable to that
History of Rwanda RPF control was occupied by France in Operation Turquoise. While the French operation did prevent mass killings it has been alleged that the deployment of French troops was intended to allow the Hutu militias to escape, and that the slaughter of Tutsis continued in the French controlled area. Between July and August 1994, Kagame's Tutsi-led RPF troops first entered Kigali and soon thereafter captured the rest of the country. The Tutsi rebels defeated the Hutu regime and ended the genocide, but approximately two million Hutu refugees - some who participated in the genocide and fearing Tutsi retribution - fled to