In the case of Warren’s individual DNA test, Bustamante resorted to what he considered the next best reference: 37 individuals from Mexico, Peru, and Colombia. According to Western scientists—who prefer migration theories that are culturally incongruent with indigenous origin stories—indigenous individuals from these countries represent the closest “sampled” biological relatives to Native Americans (that is, to those who originally inhabited what is now the United States).
This approach leaves a lot to be desired.
There is a great deal of diversity among the 573 federally recognized tribes in the contiguous U.S., all of which have unique cultural, linguistic, and historical traditions, as well as genetic differences. Of course, there exists even greater genetic heterogeneity among indigenous populations across the Americas. The terms Native American and indigenous are not interchangeable. While indigenous is ascribed globally, Native American is usually specific to the tribal peoples of the U.S.