An inherited defect of the X chromosome that causes learning difficulties. The disorder occurs within families according to an X-linked recessive pattern of inheritance (see genetic disorders). Although mainly males are affected, women can become carriers of the genetic defect. In addition to having learning difficulties, affected males tend to be tall and physically strong, with large testes, a prominent nose and jaw, increased ear length, and are prone to epileptic seizures. About a third of female carriers show some intellectual impairment. The condition cannot be treated.
Fragile X syndrome |
|
|