Polydactyly, the condition of having more than 5 fingers or toes, is an autosomal dominant trait.
A. What is the genotype(s) of person who does not have polydactyly? List all possibilities.
B. What is the genotype(s) of a person who has polydactyly? List all possibilities.
C. What is the probability that a couple will have a child with polydactyly if the man has polydactyly
but the woman does not? SHOW YOUR WORK
D. The pedigree above tracks the occurrence of polydactyly through a family. Answer the following
questions to explain what the pedigree shows.
i. What is the genotype of individual 1 in Generation III? Is this individual a male or a
female?
ii. What is the genotype of individual 1 in Generation IV?
iii. How many siblings does individual 4 in Generation II have?