Ok, genetics folks - my genetics professor told me to drop the class and consider a change in profession, so I'm not even going to try to interpret what is meant by a "split" gene in chickens. Someone explain this to me (and other clueless non-geneticists) please? I have an Araucana cockerel who I was told is "split for tufts". I have also seen the term used widely for color. Any insights into what this term refers to is quite appreciated. I am a chemist with some microbiology experience so highly capable of understanding technical explanations, it's just unclear to me outside of common usage what this means in terms of breeding. ETA: From what I understand of Araucana genetics, tufts are dominant and homozygous lethal, so it is completely unclear to me how a cockerel can be split for tufts.