And we'll see what that means in just a moment. If you are not sure what we mean by incomplete dominance go back and watch my lecture on incomplete dominance and what it means for genes to be incompletely dominant. So the capital letters represent incompletely dominant genes that express a dark color while our lowercase letters represent incompletely dominant genes that express the light skin color. Now, since each gene, as we said earlier, has an additive effect, what that means is the more uppercase letters that we have in a given person, the darker the skin color of that person is. So since each gene has an additive effect on the skin color, the more capital letters we have, the darker the skin is and vice versa. The smaller the number of capital letters is, the lighter the skin color of that particular person.