Hsien-Hsien Lei points me to another story about black and white twins. First, the "black" twin is clearly mixed race, her skin color is between the modal complexion of Europeans and sub-Saharan Africans on the von Luschan scale. The "white" twin on the other hand does seem to exhibit the color of someone of European descent. What's going on here? This is somewhat different than the other case of black and white twins, in that case both parents were mixed-race, in this case the father is white (German) and the mother is mixed-race (Jamaican & English). The two cases are different even though the outcome is pretty much the same in appearence, which goes to show that there are many ways to skin the cat.
In any case, you are getting the "million to one" odds story here. Let's see how you get there. The math here is pretty simple. ...
