Polydactyly is a dominant trait that results in extra fingers and toes in humans. A man with polydactyly marries a woman with 10 fingers and toes. They have a child that has a normal number of digits. The phenotype of the man's father is unknown, but his mother has a normal phenotype. What are the genotypes of the married couple? (D = polydactyl allele; d = wild type allele)
A. woman DD; man Dd or dd
B. woman DD; man dd
C. woman Dd; man dd
D. woman dd; man Dd
E. woman dd; man DD
Answer: D
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