One of my projects is to outcross the bloodred "pattern" as far as possible. It will be interesting to see how much of it (what we assume is a pattern) really is because of one gene, versus what can be selectively bred out of them.
It will be interesting if I can get them to the point where I hatch an otherwise 100% normal-looking cornsnake with one "I'm really a bloodred" sign to it, such as a heritable "plain belly" trait, or something like that. (Actually it would kinda suck, hehe.)