Santa's Elves and Genetic Engineering

Chuk and Salem were having a little conversation about what she'd like for Christmas. She told him she thought she might ask Santa for a "live animal". He answered her by addressing the fact that they already had enough live animals in the house, suggesting that adding more was probably not a good idea.

Her response: "Well, I probably couldn't do that anyway, because I don't think Santa's elves could make that DNA."