Genetic Evidence for Stickleback fish's evolution
In the stickleback fish, pelvic-fin reduction resulted from changes in the regulatory switch elements of the Pitx1 gene. In the marine ancestor, the Pitx1 gene is activated in the pelvic-fin region during development to generate the fin. In the pelvic-reduced stickleback, the regulatory switch that normally turns on the Pitx1 gene is either missing or non-functional.
Channels: Scientific Animations Genetics
Tags: Pitx1,gene sticklebackfish evolution
Uploaded by: sana ( Send Message ) on 02-08-2007.
Duration: 0m 58s
