The more closely related the animals are, the more similar is the code in a shared gene. Learn more about one scientist's search the genes of various animals to find out which one gave rise to all the others.
All animals have a similar set of regulatory genes that direct the formation of the body, whether it’s a worm, frog or human. This video focuses on the Hox genes, which all animals except sponges have.
Reviews the molecular evidence of evolution.
Some people like to say genes make us what we are, now it seems there is some redundancy in what we are.