Snails And Humans Use Same Genes To Tell Right From Left
Sunday, December 21, 2008 - 22:21
in Biology & Nature
The genes that in vertebrates establish the right and left sides of the body were thought to be of fairly recent origin, since fruit flies and nematodes don't have them. A new study shows that snails do use the same genes as vertebrates, suggesting that these genes arose more than 500 million years ago in the first bilaterally symmetric organisms.