Asian Migration Hypothesis And How They Spread Over The Continent in Subsequent Migrations

According to Asian migration hypothesis, in reality, individuals who are currently referred to as Native Americans got into the continent in three different great migration about 30,000 years ago. According to the hypothesis, majority of Native Americans are descended from small migrants group which traversed land bridge between America and Asia in the ice ages. These migrants who are referred to as first Americans occupied the greatest part of South and North America. However, it is believed that there were two consecutive migrations across this particular bridge. Actually, the DNA from the third and second groups can still be identified in the today’s Native Americans (Waugh, 2012).

According to the most recent research, prior to spreading across the Americas, the population of ancestral stopped in Beringia long enough to develop particular mutations. These mutations separate the lineages of the new world founder from their sister-clades in Asia, who share a common recent ancestor. In addition, lineages are found to be uniformly spread across South and North America rather than demonstrating a nested structure to south from north. Therefore, after the Beringian standstill, the first south to north migration was probably a swift process of pioneering and not a steady diffusion. Moreover, the DNA data proposes a lot more fro-ing and to-ing of populations in the past 30000 years in North America and Northeast Asia than it has been anticipated. The dataset analysis demonstrates that after the first Beringia peopling, there were a number of to and fro migrations between America and Northern Asia from Beringia. This can be explained by current flow of bi-directional gene between North American Arctic and Siberia (Lynn, 2007).

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