Yo Mama

Zach Wiener posted some excellent "yo mama" jokes for nerds. The full list is here but I'll quote the two biology ones.

"Yo mama's skin is so lumpy, the bacteria on it experience allopatric speciation"

and

"Yo mama's so scientifically illiterate she thinks ATP is where an indian live"


I'll try and think of one of my own but ATP sets a very standard.