I had a really low expression YB male for a while, he was subtle, but you could tell he was YB. This one.... I really have my doubts.

If this is really a female, and you want to breed her to see if she is YB, then the male you get better be centerfold quality YB. I mean drop dead gorgeous, holy cow what a snake YB. If you get an ivory, then you know. If not, you should still get amazing YB babies.

Gale