X-linked dominant inheritance: Difference between revisions

Revision as of 15:17, 12 April 2010

Revision as of 15:17, 12 April 2010

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'''X-linked dominant inheritance''', sometimes referred to as '''X-linked dominance''', is a mode of [[genetics|genetic inheritance]] by which a [[dominant gene]] is carried on the [[X chromosome]]. As an inheritance pattern, it is less common than the [[X-linked recessive]] type. In medicine, X-linked dominant inheritance indicates that a gene responsible for a [[genetic disorder]] is located on the X chromosome, and only one copy of the gene is sufficient to cause the disorder when inherited from a parent who has the disorder.

X-linked dominant traits do not necessarily affect males more than females (unlike [[X-linked recessive traits]] traits). The exact pattern of inheritance varies, depending on whether the father or the mother has the trait of interest. For example, all daughters of an affected father will also be affected but none of his sons will be affected (unless the mother is also affected). In addition, the mother of an affected son is also affected (but not necessarily the other way round).

==Genetics==