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African fathers

In 1998, Mike Hammer from the University of Arizona looked at variation in Y-chromosome DNA to trace the origins of the first modern human males. The Y-chromosome is passed by fathers to their sons and is responsible for maleness, so it can be used to track the male line. His results support the 'Out-of-Africa' theory: the Y-chromosome DNA of every man in the world traces back to an early African Y-chromosome. He believes that our most recent common male ancestor lived in Africa around 150-200 thousand years ago.

The inheritance of Y-chromosome DNA.

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