Quote Originally Posted by snakesRkewl View Post
Black back is a genetically inheritable trait, call it what you want but if it produces more black backs it's genetic no different than a pastel producing more pastels.

Not all black backs are genetic, I think that's where it gets a bad rap.

OP, the only way you'll know for sure is to breed it.
Not to derail but the same with granites

Back to OP, I would hold her back and breed her.