So that means we have two homologous chromosomes that are not the same shape and not the same size. So to see what we mean by that, let's take a look at the following three diagrams. So we have diagram A, diagram B and diagram C. Now, in diagram A, we have an autosomal chromosome pair. So we have this autosom chromosome number one, and it's homologous autosom chromosome number two. So one of these came from the male parent, and the other one came from the female parent. And notice in this pair, these two autosomal chromosomes are the same size and the same shape, and they carry the genes that code for the same exact types of traits.