Scanning electron micrograph of X & Y chromosomes. Humans have 46 chromosomes in total: 23 inherited from the mother and 23 from the father. These sex chromosomes determine the individual’s gender. Males have an X sex chromosome and a Y sex chromosome, and females have two X sex chromosomes.
Image from betastuffs.blogspot (link). Image originally from indigo.com
Left: Y chromosome. Right: X chromosome. The Y chromosome is smaller because it does little else than provide the SRY gene for male development.Other similar posts