Okay I'll re-post this here
From a Nov 2013 article in the National Geographic
"Great Surprise"—Native Americans Have West Eurasian Origins
Oldest human genome reveals less of an East Asian ancestry than thought.
Nearly one-third of Native American genes come from west Eurasian people linked to the Middle East and Europe, rather than entirely from East Asians as previously thought, according to a newly sequenced genome.
Based on the arm bone of a 24,000-year-old Siberian youth, the research could uncover new origins for America's indigenous peoples, as well as stir up fresh debate on Native American identities, experts say.
The study authors believe the new study could also help resolve some long-standing puzzles on the peopling of the New World, which include genetic oddities and archaeological inconsistencies. (Explore an
atlas of the human journey.)
"These results were a great surprise to us," said study co-author and ancient-DNA specialist
Eske Willerslev, of the University of Copenhagen, Denmark.
"I hadn't expected anything like this. A genome related to present-day western Eurasian populations and modern Native Americans as well was really puzzling in the beginning. How could this happen?"......This study changes this idea because it shows that a significant minority of Native American ancestry actually derives not from East Asia but from a people related to present-day western Eurasians," Willerslev said.
"It's approximately one-third of the genome, and that is a lot," he added. "So in that regard I think it's changing quite a bit of the history."
While the land bridge still formed the gateway to America, the study now portrays Native Americans as a group derived from the meeting of two different populations, one ancestral to East Asians and the other related to western Eurasians, explained Willerslev, whose research was published in the November 20 edition of the journal
Nature.
"The meeting of those two groups is what formed Native Americans as we know them." (Learn more about National Geographic's
Genographic Project.)"
Now how does this apply to The Book of Mormon? The first group left sometime after the Tower so they were not Hebrew as in descendants of Abraham, we don't know which son of Noah's they came from. If the Bible is right (although the timeline isn't) Noah landed in Western Eurasian. So with Jared in the Book of Mormon we have some western Eurasians coming to the Americas, Lehi's little group would have just been adding back in more Western Eurasian genes into the mix that was already there.
http://news.nationalgeographic.com/...e-american-people-migration-siberia-genetics/