Now remember, in humans and other deployed organisms, organisms that have a chromosome number of two N, each chromosome in Aristomatic pair contains a homologous chromosome. So since humans contain 46 individual individual chromosomes, that means we have 23 pairs of homologous chromosomes. Now, out of these 23 homologous pairs, 22 pairs are known as autosomal chromosomes. And the other pair, the final pair of chromosomes, is known as the sex chromosome pair. Now, in this lecture, we're going to focus on the sex chromosomes. Now, the first major difference between autosomal chromosomes and sex chromosomes is the following.