Genetic 342 A&B Kenneth G Wilson Professory of Botany

The Double Helix is the Resulting Model.

Linus Pauling proposes a triple helical structure

Watson and Crick base pairing explains Chargaff's Rule.

Space Filling Model

Now there are three forms of DNA

This is our friend Oliver the parrotlet, Oliver is a true parrot, the smallest in the world.