Down syndrome-A genetic chromosome 21 disorder causing developmental and intellectual delays. This occurs during when the person is a child, and it starts from birth. This occurs because the child has 1 more chromosome in the 21st set.
Klinefelter Syndrome- Where the set of chromosomes that determine gender has an extra X. Only found in males. It affects all ages and only happens with
Turner Syndrome- A chromosomal disorder in which a female is born with only one X chromosome. It occurs only to women,