Question

Polydactyly is an autosomal dominant trait in which affected individuals have more than five fingers and/or toes. If a pedigree analysis indicates that an individual affected by polydactyly has two unaffected parents, then this suggests that polydactyly exhibits___________.

Answer 1

Answer:

Reduced penetrance or incomplete penetrance

Explanation:

Penetrance refers to the extend which a certain gene or set of genes is expressed in a population.

It can be complete where there is expression of the gene in a population having it.

Whereas, in reduced penetrance is where the mutation is not expressed in every individual in the population having it.

For instance polydactyly exhibits reduced penetrance since the parents had the mutation it was not expressed it came to be expressed on their pedigree.