The "Average Ethnicity" chart below shows the average genetic ethnicities estimated for natives from a region. Many regions are very homogeneous in that most of the DNA for region members is estimated to come from that region. Some regions are more and we see significant overlap with other neighboring regions. This generally appears to occur where neighboring regions have fewer geographical borders (such as mountains or oceans) to cross, and where there is a history of trade, commerce, travel, and perhaps war.
Members of our native sample collection are unique because their family has lived in their region for centuries. Yet, even these natives are not 100% similar to their own region. That is because every region has some degree of admixture.
Genetic admixture occurs when individuals from two or more previously separated populations begin intermarrying. Admixture results in the introduction of new genetic lineages into a population.
Still curious to understand more? Cool--we're glad you're as interested in genetics as we are. Check out our white paper on ethnicity prediction.