The discovery and analysis of an extremely rare African American Y chromosome push back the time of the most recent common ancestor for the Y chromosome lineage tree to 338,000 years ago. This time predates the age of the oldest known anatomically modern human fossils.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/x...
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/x...