Board Thread:General Discussion/@comment-22027448-20150414115354/@comment-26072045-20150414131318

Identical twins are born when in the process of mitosis when a cell is duplicated it ends up making another organism all together. From that point on they can form differently, though they'll have most of the same features. Tia and Tamera Mowry and Dylan and Cole Sprouse are really good examples of this. As for the six fingers something probably went wrong in the process of cell generation. Sort of like why some people have six feet or webbed toes and stuff.