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Family Tree DNA's Genomics Research Center Facilitates Discovery of Extremely Ancient Root to the Human Y Chromosome Phylogenetic Tree
Date:3/26/2013

ily roots using one of our genealogy products," said Gene By Gene President Bennett Greenspan .  "While reviewing samples in our database, she recognized that this specific sample was unique and brought it to the attention of our scientists to do further testing.  The results were astounding and show the value of individuals undergoing DNA testing so that we can continue to grow our databases and discover additional critical information about human origins and evolution."

The discovery took place at Family Tree DNA's Genomic Research Center, a CLIA registered lab in Houston which has processed more than 5 million discrete DNA tests from more than 700,000 individuals and organizations, including participants in the Genographic Project.  Drs. Thomas and Astrid-Maria Krahn of Family Tree DNA conducted the company's Walk-Through-Y test on the sample and during the scoring process, quickly realized the unique nature of the sample, given the vast number of mutations.  Following their initial findings, Dr. Hammer and others joined to conduct a formal study, sequencing ~240 kb of the chromosome sample to identify private, derived mutations on this lineage, which has been named A00.

"Our findings indicate that the last common Y chromosome ancestor may have lived long before the first anatomically modern humans appeared in Africa about 195,000 years ago," said Dr. Michael Hammer .  "Furthermore, the sample, which came from an African American man living in South Carolina, matched Y chromosome DNA of males from a very small area in western Cameroon, indicating that the lineage is extremely rare in Africa today, and its presence in the US is likely due to the Atlantic slave trade.  This is a huge discovery for our fie
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SOURCE Gene By Gene, Ltd.
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