Genetic Switches Enable New Uses to Evolve

The stickleback Pitx1 gene is turned on or off in multiple tissues to contribute to different traits.

Animation: Pitx1 switching in two types of sticklebacks

Dr. David Kingsley

Genetic Switches and New Species

Losing or gaining genetic switches can make the difference between species. In Drosophila the difference may be as small as spots on the wing.

Animation: Paintbrush gene switch in the fruit fly

Dr. Sean Carroll