[ There's really no concrete parallel for Liz, so she's trying to figure this out on her own. ]

Then you're -- human.

[ Check. ]

And your parents were, too. Only mutants, too.

[ Also, check. ]

And because of that mutation, or their mutations or whatever it is, you ended up looking like a blue elf.

[ ... She never really got how genetics worked in the first place, but man, she really, really isn't getting them now. ]

But if you can't always tell, then what does being a mutant -- do? You just are? And it only matters when you end up --

[ alsjfdk she trails off and can't really be seen gesturing at the journal but that is exactly what she's doing. ]