Under the vast and fascinating field of biology, comes the branch called genetics which studies genes, heredity and organism variations. One of the primary units of the study of is human genitics the chromosome. The human body is made up of billions of cells - each human cell is made up of 46 homologous chromosomes, which are paired, to make 23 pairs. Of these 23 pairs, 22 are non-sex homologous chromosomes or autosomes, whereas one single pair is a sex chromosome. In females, all 23 pairs of chromosomes are identical, that is, each pair is made up of 2 X chromosomes. In males however, the sex chromosome is made up of one X and one Y chromosome, which pair up to form an XY sequence. At the genetic level, this is the difference between the male and female of the species.
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