I think a lot also has to do with the parents and what other types of phenotypes they pass on. I have a male and female het for VPI Axanthic. The female came from a Lemon Pastel to a VPI Axanthic pairing and the male came from a VPI Axanthic to a het VPI Axanthic. The female is a lot more dark golden in color, but the male is a lighter gold. If I were looking at a normal animal and trying to decide if it might be hiding a het gene, I'd pick the male over the female because he is lighter in color, has a funky head marking and a more strange pattern.
Female
Male
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