I'm just going to say that Apocalypse is NOT the "first mutant in existence", Selene for example, is much older.

Not the point of the post, plus the First Mutant is Apocalypse's title.

I still find it odd Franklin is a mutant when nobody else in his family is.

@Dr. Nice it happens in marvel

@Dr. Nice I mean, most mutants we know have human parents, because mutants are the next step in human evolution.

@Splitnut plus, its mainly random when mutants are born from human parents, like the Guthires, but I guess with Reed and Sue (like Peter in some universes) being mutates, can grant you more mutates or more likely mutants