Human chromosome much older than previously thought
2013 03 20

From: Heritage Daily

A newly discovered chromosome places the most recent common ancestor for the Y chromosome lineage more 100,000 years before the oldest known anatomically modern human fossils.

UA geneticists have discovered the oldest known genetic branch of the human Y chromosome – the hereditary factor determining male sex.

The new divergent lineage, which was found in an individual who submitted his DNA to Family Tree DNA, a company specializing in DNA analysis to trace family roots, branched from the Y chromosome tree before the first appearance of anatomically modern humans in the fossil record.

The results are published in the American Journal of Human Genetics: http://www.cell.com/AJHG/abstract/S0002-9297(13)00073-6

“Our analysis indicates this lineage diverged from previously known Y chromosomes about 300,000 ago, a time when anatomically modern humans had not yet evolved,” said Michael Hammer, an associate professor in the University of Arizona’s department of ecology and evolutionary biology and a research scientist at the UA’s Arizona Research Labs. “This pushes back the time the last common Y chromosome ancestor lived by almost 70 percent.”


[...]

Read the full article at: heritagedaily.com



Related Articles
Four-strand DNA structure found in cells
DNA Technique Reveals Looks of Long-Dead Humans
Are genes our destiny? ’Hidden’ code in DNA evolves more rapidly than genetic code
MtDNA tests trace all modern horses back to single ancestor 140,000 years ago


Latest News from our Front Page

Guccifer: Pennsylvania City to be Nuked Next Year
2014 11 25
From Youtube: Renowned hacker Guccifer, who accessed the private emails of numerous top military, political and intelligence leaders, told the New York Times that a city in Pennsylvania is the target of a nuke attack in 2015. Guccifer also revealed that he is sitting on an archive of hacked emails that have not been publicly released.
Israeli Police Caught On Video Hosing ‘Skunk Spray’ on Palestinian Elementary Schools and Protesters
2014 11 25
Israeli police in Jerusalem have been caught on video recently spraying East Jerusalem Palestinian neighborhoods with a concoction they call “skunk spray”. The liquid is a mixture of sewage and rotting animal roadkill. The result of the police hosing down neighborhoods, elementary schools and protesters with the mix is a putrid smell that seems almost impossible to get off or be ...
The New Normal: Artist Butchers "Disney Princesses" with Breast Cancer Scars
2014 11 25
Comment: Natural remedies for cancer, like: diet, vitamins, minerals and other supplements are NEVER addressed. Neither are chemicals and wi-fi saturated environment recognized for the rise in these new epidemics. Instead ... what do they do? They normalize it. Like it’s just the new thing you need to do. Change nothing and adapt to these new circumstances of mutilation kids. ...
Gasp, Turkish President Observes Reality: "Women and Men Created Differently"
2014 11 25
Comment: Wow, a politician that manage to observe reality. Shocking and offensive no doubt, I wonder how the pro Muslim Feminists in Scandinavia and the rest of the West will react to this. Turkish President Recep Tayyip Erdogan set off a new controversy on Monday, declaring that women are not equal to men and accusing feminists of not understanding the special ...
The Libertarian Case for Free Trade And Restricted Immigration
2014 11 25
It is frequently maintained that "free trade" belongs to "free immigration" as "protectionism" does to "restricted immigration." That is, the claim is made that while it is not impossible that someone might combine protectionism with free immigration, or free trade with restricted immigration, these positions are intellectually inconsistent, and thus erroneous. Hence, insofar as people seek to avoid errors, they ...
More News »