I think the other genetics thread examines the numbers quite thoroughly, Manny. Since there aren't any major observable changes in VV3 to the methods the game uses in selecting head types, I think we can safely leave the math in the VV3 threads.

I also may be mistaken, but Gmom seems to have a grasp of the genetics already; she's correct that blonds are among the hardest to breed, along with the black-haired villagers. If you let a blond- or black-haired tribe to itself, they generally seem to creep back towards brunettes or redheads. She also has an obvious grasp of the system used for numbering the head types, so I'm sure we don't have to re-explain all this here.