So let's suppose our dog is homozygous dominant for our D gene. And so we have uppercase D, uppercase D. In this particular case, what happens is we're going to have a dark coat color, but there are two possibilities. We can either have a light brown color, so a chocolate color, or we can have a black color. So we have a lighter coat and we have a darker coat. Now, the chocolate coat or the black coat depends on the second gene type. So if we have uppercase D, uppercase D, and we have, let's say, uppercase B, uppercase B.