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Term Definition
Autosomal Dominant

Some forms of ectodermal dysplasia, may be inherited in an autosomal dominant fashion.  Autosomal dominant means you need only one mutation to have the disorder.  Autosomal dominant disorders usually have an affected parent, because the parent carries one mutated copy of the gene which is then passed to the child who has the disorder.  More often in families with a child affected by ectodermal dysplasia, the mutation will be a de novo mutation, meaning it has arisen spontaneously, and the parent does not have it, but the child does.