I read that entire thing. I'm not into the science of it like you are but its all very interesting to me. I too have wondered about the differences between co-dom and incomplete dom. Its interesting you brought up the blood type example. The one that always confused me was 0- verses 0+. For example.. I am 0+. When I got pregnant I was told by the Dr that if it was a girl I would most likely lose it unless they caught it in time for suppliments. The babies dad is 0-. I was told that 0- is not compatible with 0+ if the fetus is male. I do not understand this but because the fetus was male, my son was born being 0- just like his father, grandfather, grandmother and aunt. How does that work?? Ive wondered if it is similer in snakes genes. Like how some mutations do not survive. The pearl for example dies shortly after hatching. In boas the super motley does not live to breeding age. Could it be the same type of genetic incompatibility?