Hey y'all, I found a cool new story and thought I'd make a quick post about it.
A new study was published by the University of Arizona a few days ago that could change how we understand the evolution of the Y chromosome. The older version of the chromosome was found in an American individual who had submitted his DNA to a company that sequenced genomes. If the dating is accurate, then it is likely that the Y chromosome developed much earlier than anticipated; well before the evolution of modern humans. This divergent lineage has thus far only been found in small populations in Cameroon, which lead the authors to believe that there may be multiple populations with the older chromosome. This study calls into question the common idea of "mitochodrial Eve" and "Y chromosome Adam" because it provides some evidence that there were more than one community from which modern humans evolved.
Here's a link to the story!
http://www.sciencedaily.com/releases/2013/03/130305145821.htm
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