what is your favourite ball python recessive gene?

[Bassball Fever]

So Ultramel! Pewter isn't actually a recessive morph. It's simply a combination of two co-dominant morphs (pastel and cinnamon), just thought I'd clear this up so it doesn't confuse anyone

Oops, I didn't see the recessive gene part of the question. So yeah, Ultramel!

And thanks for clearing that up.