Recently, researchers Department of Ecology and Evolutionary Biology University of Arizona struck by a DNA sample of African-American men in South Carolina named Albert Perry.

They were surprised because of the results of the analysis they did, the Y chromosome of Perry was not related to the chromosomes of the other samples, and allegedly separated from the family tree when modern humans evolved yet.

"Analysis indicates that leg of the Y chromosome lineage about 338,000 years ago, when there was the evolution of modern human anatomy," said Michael Hammer, professor of the University of Arizona that involved research.

"These findings encourage the existence of ancestral Y chromosome to 70 percent to the rear," added Discovery Hammer as quoted on Thursday (07/03/2013).

Driven curiosity, Hammer and his team send DNA samples to the man in the family tree sorted (sequencing). The process of sequencing performed by Fernando Mendez, a post-doctoral researcher at the University of Arizona.

In the process, Mendez uses more than 240,000 pairs of chromosome Y. Mendez sequencing results showed the similarity between the DNA samples of African-American men in South Carolina and a remote tribe living in western Cameroon, the tribe Mbo.

Hammer warned, this finding does not mean that all human beings in the world originated from a common ancestor who lived in the west of Cameroon.

"There is a misconception that states that the revelations of kinship and genetic information from one location to reflect the diversity of the population. Finding it states that there are many genetically isolated communities that protect human diversity," said Hammer.

Hammer said the other Y chromosome is likely to be found, again pushing back the age of the Y chromosome. These findings have broad implications, asserts that there is no so-called "mitochondrial Eve" or "Y-chromosome Adam". Humans as a whole is not exactly coming from a man who lived in the same time period evousi humans.

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