I was browsing around kingsnake and noticed the oddness of the Platinum gene. So I checked it out on Nerd, but they didn't seem to have the answer. What they said was
Pp=Platinum
PP=Ivory
But some how PPxPP=Ultra Ivory

Obviously genetically all you could get would be an Ivory, in a perfect world.

They said the first one(ultra ivory) they produced was from a PPxPp. The only thing I could think of would be multiple alleles controlling these traits, and the ultra ivory morph being a result a recessive gene. So there first one would have been more like PPUuxPpUu. Resulting in, as so theorized, a PPUU, or a Ultra Ivory.

I know I'm probably way off, but I thought is throw that out there.

Thoughts?