Adam Gibson gets introduced to the world of pet cloning at RePet.

Dr. Bruckner demonstrates cloning by injecting the blood cells of a black rabbit into a white rabbit egg.

Sophie tackles the question of why there are so many different breeds of dogs. She briefly discusses the history of dogs and discusses how genetics makes dogs different and why some breeds are better suited for certain functions.

Eugene uses his own DNA samples to help Vincent pass as a "valid," or someone with a superior genetic makeup. Vincent attempts to remove as many traces of his own DNA so that he can still qualify as a "valid."

Hank explains how one's genotype affects his/her phenotype then gives an example of male pattern baldness to illustrate his point.