X-dominant disorders are caused by defects in genes on the X chromosome. Common X-dominant disorders include: 1. Hereditary nephritis. The disease is often characterized by proteinuria or hematuria in early childhood, and progresses to chronic renal failure in young adulthood, with some patients also having abnormalities of the eyes, vision and hearing in the ears. 2. Hereditary psychiatric disorders. Most hereditary psychiatric disorders are X-dominant. 3. progressive muscular dystrophy. The child has difficulty walking at first, walking Louis falls, unlike children of the same age can easily jump, this disease will lead to heart oversized heart slow, serious heart and liver failure and death. 4, common with X dominant genetic disease, there are anti-vitamin D rickets, lipoma, dark brown teeth, primary hypertension, anencephaly, familial high cholesterol, congenital chondrodysplasia, etc..