Native American Population History And Genetics - 988 Words

The Americas are the most recently human populated continents on the planet, at around 15,000 years before present. The Asian ancestors of Native Americans crossed over a land bridge, connecting Asia to North America, during the earths last glacial maximum in the late Pleistocene (Dennis et al., 2010). Native American population history and genetics are still very new subjects of research and there is still much debate over questions such as: What routes were taken by the migrating Native American peoples? When was the migration? How many migrations occurred? As the genomes of Native Americans are analyzed further, we will gain valuable insight and estimations of when and how the peopling of the Americas took place. As earth’s last continents to be colonized by humans, all skeletal remains found in the Americas are modern Homo sapiens. Modern human dispersal out of Africa across Eurasia began about 50 ka and reached the Americas around 15ka (Goebel, 2008). The last global maximum took place around 20ka when sea level was 60ft lower than present day and the land bridge between Beringia and Tierra del Fuego was exposed. Routes of migration are hard to estimate from genetic data. Archaeological data tells us that humans entered America around the end of the Wisconsin glaciation, 11ka, via an ice-free mid-continental corridor. This model would support a relatively even latitudinal migration southward. An alternative migration route is along the Pacific coasts. This model couldShow MoreRelatedThe Evolution Of Eugenics1721 Words   |  7 PagesFrom evaluating the history that eugenics has imposed, its negative practice has been marked in ways of unrighteous holocaust and genocides worldwide. T he word â€Å"eugenics† has been worldly defined and seen as the destruction of undesirable traits, in all reality people. However, the practice of altering or ridding of specific genes or minority group has changed through the evolution of time. 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