Topic ID #7983 - posted 6/29/2010 6:37 AM
Jennifer Palmer
Webmaster
North America's First Peoples More Genetically Diverse Than Thought
Jennifer Palmer
Webmaster
North America's First Peoples More Genetically Diverse Than Thought, Mitochondrial Genome Analysis Reveals
ScienceDaily (June 28, 2010) — The initial peopling of North America from Asia occurred approximately 15,000-18,000 years ago. However, estimations of the genetic diversity of the first settlers have remained inaccurate. In a report published online in Genome Research, researchers have found that the diversity of the first Americans has been significantly underestimated, underscoring the importance of comprehensive sampling for accurate analysis of human migrations.
Substantial evidence suggests that humans first crossed into North America from Asia over a land bridge called Beringia, connecting eastern Siberia and Alaska. Genetic studies have shed light on the initial lineages that entered North America, distinguishing the earliest Native American groups from those that arrived later. However, a clear picture of the number of initial migratory events and routes has been elusive due to incomplete analysis.
Read the rest of the article here.
ScienceDaily (June 28, 2010) — The initial peopling of North America from Asia occurred approximately 15,000-18,000 years ago. However, estimations of the genetic diversity of the first settlers have remained inaccurate. In a report published online in Genome Research, researchers have found that the diversity of the first Americans has been significantly underestimated, underscoring the importance of comprehensive sampling for accurate analysis of human migrations.
Substantial evidence suggests that humans first crossed into North America from Asia over a land bridge called Beringia, connecting eastern Siberia and Alaska. Genetic studies have shed light on the initial lineages that entered North America, distinguishing the earliest Native American groups from those that arrived later. However, a clear picture of the number of initial migratory events and routes has been elusive due to incomplete analysis.
Read the rest of the article here.
Post ID#17815 - replied 7/1/2010 11:10 AM
marehart
eh, I'm not impressed. Nothing new really. This butts up against the now established observation that the Americas were peopled way before 15K BC and with multiple waves of migration. Their group is behind the learning curve and only is hurt by their narrow sampling.
Granted, it might be all that's available to them, but then they should not express such sure conclusions about their extrapolations. Despite the hype, gene tracing is full of near SWAG assumptions and the technical aspects are not up to the claims by any stretch of the imagination-- or perhaps they are due to an over-stretching of the imagination!
Granted, it might be all that's available to them, but then they should not express such sure conclusions about their extrapolations. Despite the hype, gene tracing is full of near SWAG assumptions and the technical aspects are not up to the claims by any stretch of the imagination-- or perhaps they are due to an over-stretching of the imagination!
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