How legs were lost during snake evolution

How Legs Were Lost during Snake Evolution/ Curr. Biol., Oct. 20, 2016 (Vol. 26, Issue 21) - Most snakes are completely limbless, but some snakes diverged from the lineage leading to the advanced snakes before legs were completely eliminated. Pythons are a group of snakes that retain a pelvis and a small remnant of the femur, known as the spur. Francisca Leal and Marty Cohn at the University of Florida discovered that deletions in an enhancer of the Sonic hedgehog gene are responsible for the arr