Inheritance
This condition is usually inherited in an autosomal dominant pattern, which means one copy of the altered gene is sufficient to cause the disorder. In most cases, an affected person has one parent with the condition. A small percentage of cases result from new mutations in the gene; these cases occur in people with no history of the disorder in their family.
Some cases of type II and type IV Waardenburg syndrome appear to have an autosomal recessive pattern of inheritance, which means two copies of the gene must be altered for a person to be affected by the disorder. Most often, the parents of a child with an autosomal recessive disorder are not affected but are carriers of one copy of the altered gene.
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Waardenburg syndrome is usually inherited in an autosomal dominant pattern.
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Types II and IV Waardenburg syndrome may sometimes have an autosomal recessive pattern of inheritance.
Read more about this topic: Waardenburg Syndrome
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—Joseph Conrad (1857–1924)