And to see exactly what we mean by that, let's consider albino individuals. So, in albino individuals, it's a single pair of jeans at some particular locus that actually affects the expression of three different types of characteristics, of three different types of phenotype traits. So, number one, lack of pigment hair, lack of pigment in the hair. Number two, lack of pigment in the eyes. And number three, lack of pigment in the skin. These three different types of phenotype traits are expressed as a result of a single locus.