Well most genes are not simple recessives but I think you might have asked the question wrong assuming that you’re talking about Joey’s post about a line of co-dominant hypo coastal plains milk?

I can’t really speak to all of colubrids but as I understand it we in the hobby misuse “co-dominant” quite frequently.

Co-dominance like incomplete dominance is manifest in the heterozygous state. An example of incomplete dominance is the hypo boa. A het is hypo and an animal that is homozygous for the trait is a supper hypo.

Co-dominant however associates with ANOTHER gene to make a THIRD phenotype. I can’t think a specific reptile example but it would go like this if you bred a red morph to a yellow morph you’d get an F1 that’s orange. By contrast if both the red and yellow morphs were simple recessives, you’d get a normal phenotype that was “double het” for the two parent morphs.

In my experience, the original strain (to my knowledge only strain) of hypo coastal is somewhat of an incomplete dominant gene in that you can pick out the hets from a group of 67% possible hets with a high degree of accuracy. Het hypo coastals, generally speaking are significantly brighter than their non het siblings. I’d never sell an animal as a het that way but it sure works well for me.

Anyway, this might be what Joey was talking about but it’s nothing new. You can change the name but the beast remains the same.

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