Oh dear. No matter what, I have a lot to learn about chicken genetics. On the point of exceptions happening, I do know from sheep that unexplained things do happen. For instance, 2 black sheep should never be able to produce a white one because black is recessive. I had it happen that cross...
Thanks everyone! I'm used to mammalian and plant genetics. Poultry genetics is completely new to me and you all explained this wonderfully. I think I understand now.
I have a lemon cuckoo orp roo and a buff orp hen. I'm trying to get an idea what will result from the cross before I do it. Is the lemon cuckoo recessive? Thanks.