That is not how a dominant trait in genetics works- it means you only need one copy to express the phenotype, but it is no more likely to be passed on than any

That is not how a dominant trait in genetics works- it means you only need one copy to express the phenotype, but it is no more likely to be passed on than any other genetic trait. It is possible to have a trait that occurs with high frequency in a population- so that almost everyone has 2 copies of it.