A member asked:

Mom had an extra digit at birth, brother had congenital disability, what are the risk factors?

A doctor has provided 1 answer

Varies: The extra digit issue is usually an autosomal dominant trait with variable presentation.It can skip a generation and theoretically 50% of the offspring would carry the gene.The disability in the brother is unrelated and more information on his disability would be needed for comment.

Answered 7/12/2013

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