Down Syndrome is a genetic chromosome 21 disorder causing developmental and intellectual delays. It occurs as a random event during cell division early in fetal development. It is usually caused by an error in cell division called nondisjunction. Early in fetal development.
Klinefelter Syndrome is a genetic condition in which a male is born with an extra copy of the X chromosome. The presence of an extra X chromosome in males most often occurs when the genetic material in the egg splits unevenly. But it can also occur when the genetic material in the sperm splits unevenly.
Turner Syndrome is a chromosomal disorder in which a female is born with only one X chromosome. In an affected individual it occurs as a random event during cell division in early fetal development.
Color Blindness is a reduced ability to distinguish between certain colors. It is usually a genetic condition. It is usually passed down from your parents. The gene which is responsible for the condition is carried on the X chromosome and this is the reason why many more men are affected than women.