Yeah like @eddie_van_quailen said it creates a Rosetta, but I feel like there's always the possibility of getting a chick that's looks like one of the parents due to that color being dominate.I have a recent hatch (24 chicks). Out of those 7 are Rosetta and 3 of them have almost the identical white markings under the beak.
Have you noticed that marking being passed down in the next generation?