In Blumenbach's concept, the Mongolian race comprises the peoples living in Asia east of the , the and the , with the exception of the , who form a race of their own in his concept.
The Gm ab3st gene, which is found with its the highest incidence among the northern Baikal Buriats, flows in all directions.
This might explain why the regional variations in skull type that characterize caucasoid peoples those of western Eurasia: India, Europe and the Near East and mongoloids peoples of East Asia do not become evident until the Holocene, the warm period that succeeded the great Pleistocene ice age 10,000 years ago.
Sebuah studi genetik Chen 2020 menemukan bukti lebih lanjut tentang asal mula unik ras Mongoloid.