Turner Syndrome Or Monosomy X

Turner syndrome, or monosomy X, is a disease caused by an error in meiosis wherein the sex chromosomes do not divide properly, and only effects females. It occurs during the formation of the reproductive cells in the parent, where an error (nondisjunction) in cell divison produces an abnormal number of chromosomes.

Turner syndrome results in one of two effects on the genetic makeup of the individual. It can either occur as a result of partially missing or rearranged sex chromosomes, or from a complete lack of one of the two usual sex chromosomes. In some cases, it can arise in females where some, not all, of their cells are effected with Turner syndrome, referred to mosaic Turner syndrome.

Turner syndrome is expressed in various conditions