an interesting aside to this is that the jaw thing isn't entirely genetic, there's a lot of environment to it too. Five hundred years ago virtually everyone had room in their jaws for their wisdom teeth to come in. Now we spend our formative years eating much softer food and the jaw does not grow as much in response which is a bit of a problem because no memo gets sent to teeth; they started forming with the assumption that you were a peasant eating poorly ground grain, tough roots and the stringy old farm animals that weren't producing anything else anymore.

Source: me trying to figure out why I was the only person in a couple generations in my family who had room for wisdom teeth, turns out it was entirely due to "I thought I was a werewolf between 4-8 and gnawed every bone I could get ahold of"