What’s the reason 16.3 of the population unable to roll their tongue?

Question

What’s the reason 16.3 of the population unable to roll their tongue?

In: Biology

Answer 1

Genetics. It was a mutation to either be able to roll your tongue or not. And then one of them is more dominant than the other (I think being able to roll the tongue but I’m not sure). But when someone gets the genetics from two people that can’t roll their tongues, that person won’t be able to roll their tongue either. So therefore, as being able to roll your tongue is dominant, it is more common to be able to roll your tongue