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Originally Posted by Ssthisto
Correct me if I'm wrong, but I'd been under the impression that this is not always the case. We may someday discover a corn snake 'mutant' gene that is dominant or codominant to 'wild type' (and 'bloodred/diffuse' may actually already qualify if you get visual hets).
I know that, in mice, there's a mutant gene producing tan bellies that is visible even on wild-type Agouti.
Granted, the majority of known morphs are simple Mendelian recessives.
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No, you're not wrong. I'm simply doing a general over-view on cornsnake genetics and so far, 97% of the current morphs are simple recessive. I'm leaving out that 3% as zigzag/aztec may be co-dominant and a few other morphs (bloodred and cubed, for example) are still not fully understood.