Risk calculation - de novo mutation
A couple has a child with achondroplasia. Both parents have normal height and clinically normal and neither has a family history of achondroplasia.
What is the probable explanation for achondroplasia in their child?
What is the risk of recurrence in other children of this couple?
If the husband has another child by a different mother, what would the risk of achondroplasia be in that child?
What is the risk that any offspring of the affected child will also have achondroplasia?
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