This site complies with the HONcode standard for trustworthy health information: verify here. Learn more about A.D.A.M.'s editorial policy editorial process and privacy policy. is among the first to achieve this important distinction for online health information and services. follows rigorous standards of quality and accountability. is accredited by URAC, for Health Content Provider (URAC's accreditation program is an independent audit to verify that A.D.A.M. If someone is diagnosed with an autosomal dominant disease, their parents should also be tested for the abnormal gene.Д®xamples of autosomal dominant disorders include Marfan syndrome and neurofibromatosis type 1.ДЄ.D.A.M., Inc. It means that each child's risk for the disease does not depend on whether their sibling has the disease.Д¬hildren who do not inherit the abnormal gene will not develop or pass on the disease.

This disease can also occur as a new condition in a child when neither parent has the abnormal gene.ДЄ parent with an autosomal dominant condition has a 50% chance of having a child with the condition. This happens even when the matching gene from the other parent is normal. It also depends on whether the trait is dominant or recessive.ДЄ single abnormal gene on one of the first 22 nonsex ( autosomal) chromosomes from either parent can cause an autosomal disorder.Дominant inheritance means an abnormal gene from one parent can cause disease. Inheriting a disease, condition, or trait depends on the type of chromosome affected (nonsex or sex chromosome).

Why does dominant traits show up rarely