Want to know more about your genetic roots? Then you are not alone. Most tests trace your maternal and paternal lines, by examining genetic markers on the mitochondrial DNA, which is passed from mother to child, or on the Y chromosome, passed from father to son. Like the roots of a tree, however, your genetic roots keep branching the deeper you look: tracing just two of these lines tells you nothing about all the others.
via Genome at 10: Meet your ancestors – life – 24 June 2010 – New Scientist.
