Looks as though the farmers were a completely separate, invading ethnic group from the hunter-gatherers. http://www.sciencedaily.com/releases/2010/11/101109172344.htm#.T_TMxOmhpx4.email<http://www.sciencedaily.com/releases/2010/11/101109172344.htm#.T_TMxOmhpx4.email> Diane H.