Thread:BastionMonk/@comment-3213993-20151224030157

This paper is pretty interesting. In it, the authors look at digit development in modern animals and use that knowledge to deduce the genetic mechanisms behind the evolution of the ichthyosaur flipper. According to them, the flipper evolved through expansion of a polyalanine tract in the HoxD13 gene. Another paper explores potential developmental mechanisms behind the evolution of the pterosaur wing. What do you think? 