Hutu reify the biological distinctions, generating a taller elite and a shorter underclass, but with little relation to the gene pools that had existed a few centuries ago. The social categories are thus real, but there is little if any detectable genetic differentiation between Hutu and Tutsi. Tishkoff et al. (2009) found their mixed Hutu and Tutsi samples from Rwanda to be predominately of Bantu origin, with minor gene flow from Afro-Asiatic communities (17.7% Afro-Asiatic genes found in the mixed Hutu/Tutsi population). Hutus speak Rwanda-Rundi as their native tongue, which is a member of the Bantu subgroup of the Niger–Congo language
Rwandan genocide own, but by this stage the Hutu had full backing from the Belgian administration who wanted to overturn the Tutsi domination. In early 1960, the Belgians replaced most Tutsi chiefs with Hutu and organised mid-year commune elections which returned an overwhelming Hutu majority. The king was deposed, a Hutu dominated republic created, and the country became independent in 1962. As the revolution progressed, Tutsi began leaving the country to escape the Hutu purges, settling in the four neighbouring countries: Burundi, Uganda, Tanzania and Zaire. These exiles, unlike the Banyarwanda who migrated during the pre-colonial and colonial era, were regarded as