Orthognathous:
Orthognathy developed relatively early in the evolution of Homo sapiens and continuously increased in frequency, especially in colder regions. It is widespread in Europe, much of North and East Asia, as well as most parts of Polynesia and America. In Africa, orthognathy is common in the North of the continent as well as in many East Africans (Ethiopids). Orthognathy is also frequent in Khoisans of South Africa.