Ability to perform an action doesn't impact on its morality. I would guess that empathy is genetic, and so a moral fact might be that causing undeserved pain t

Ability to perform an action doesn't impact on its morality. I would guess that empathy is genetic, and so a moral fact might be that causing undeserved pain to someone with whom you can empathise with is wrong. "Undeserved" of course is wooly at the point of expression. Fear of death I'd guess to also be genetic, so another moral fact might be that suicide outside of an overriding other moral purpose being wrong might constitute "moral fact", although like the last example, its expression is clouded by other non-fact morals that come in to play. Incest taboo seems to be genetically expressed too, so you can probably include that.