Actually, there is something that is passed down from father to child, like the mRNA, but not the same [I don't know exactly what it is], and they can use that to trace descent in the male line as well, so between the two of them they can now make a full family tree. That is how scientists claim to have traced the "Mitonchonrial Eve" and "Mitochondrial Adam".
Sydney, could you tell us how long it is since we diverged? It sounds like a piece of trivia worth knowing...
Another piece of trivia: Chimpanzees and Gorrillas are more closely related to Humans than they are to each other...
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Guns don't kill people, People kill people! Using Guns.
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