You are studying a family in which a number of individuals have polydactyly. Polydactyly is inherited in an autosomal dominant way. You notice the affected individuals all have slightly different phenotypes. For example, some have fully formed 6th fingers while others have incompletely formed ones. The polydactyly-causing allele is the same in all the affected individuals. What's happening here?
Added by Derek L.
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Polydactyly is inherited in an autosomal dominant way, which means that only one copy of the mutated gene is needed for the trait to be expressed. Show more…
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