Coragyps

Damn, tgamble, you're good at them there apologetics! You really ought to consider going over to the dark side - they may need a pinch-hitter if Hovind goes into true in-prison ministry.

Aldehyde

If Adam and Eve really existed, their bloodgroups would be AO and BO.

gallo

And one would have been Rh+ and the other Rh-.

As a side note, an Rh- woman whose husband is Rh+ will frequently have difficulty with a second pregnancy. It seems that she will become sensitized to the Rh- antigen during the first pregnancy - probably during delivery - and as a result "reject" the Rh+ fetus. Since my mother is B- (2nd rarest blood type) when I was born with absolutely no indication of Rh- rejection, the Dr. predicted that my father was Rh-. Later when all of our blood types were established, this was shown to be correct. Of course, both of my brothers are Rh-, and by chance we are all O-. My father is also O-. My mother must necessarily be genotype BO-.