Ancient Denisovan DNA discovered in modern Pacific Islanders
The archaic Denisovan and Neanderthal DNA that persists in modern individuals from the Pacific islands of Melanesia could be a source of new information about early human history, according to a report published this Thursday in the Early Release edition of Science.
Equally as informative, according to Joshua Akey, a UW Medicine expert on human evolutionary genetics, are regions where DNA from extinct, human-like species has vanished from the genome and has been replaced with sequences unique to people.
Denisovans are related to, but distinct from, Neanderthals. This prehistoric species was discovered less than a decade ago through genetic analysis of a finger bone unearthed in northern Siberia. Named for the mountain cave where that fossil, and later, two teeth, were found, Denisovans became a new addition to our ancient cousins on the evolutionary tree.
Denisova Cave in northern Siberia (public domain)
Substantial amounts of Denisovan DNA have been detected in the genomes of only few present-day human populations so far. They are all living in Oceania, thousands of miles away from that Siberian cave.
“I think that people (and Neanderthals and Denisovans) liked to wander,” said Benjamin Vernot, a UW postdoctoral student in genomic sciences who led the project. “And yes, studies like this can help us track where they wandered.”
www.Ancient-Origins.net – Reconstructing the story of humanity’s past
Source: http://www.ancient-origins.net/news-evolution-human-origins/ancient-denisovan-dna-discovered-modern-pacific-islanders-005569
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