The Big Bang Theory Quiz: How Well Do You Remember The Last Episode?

Penny Sheldon Leonard - The Big Bang Theory
CBS

6. What Kind Of DNA Model Were Sheldon And Leonard Repairing?

A Genetic Code For An Advanced Race Of Animals

A Genetic Code For An Advanced Race Of Monkeys

A Genetic Code For An Advanced Race Of Dogs

A Genetic Code For An Advanced Race Of Human Beings
Contributor

Brian Uthar hasn't written a bio just yet, but if they had... it would appear here.