Donnie, April and others in “Unfinished Business”

This...doesn't seem possible.

What is it? What’s wrong?

Based on all the evidence I’ve clued from the lab, your cellular makeup is actually a morph-genetic blend of human and Kraang DNA.

Wait. Are you saying...?

You're not entirely human, April. That's why you have psychic powers. In fact, you are a half human, half alien-mutant.

A mutant!?

Oh, yeah! Welcome to the family!