Analyze the pedigree given here, answering the questions that follow.
I
II
III
IV
a. What is the most likely mode of inheritance of this trait: autosomal or X-linked, dominant
or recessive? Give reasons to support your answer, referring to specific examples in the pedi-
gree.
b. Providing a legend for your symbols, give the genotypes of individuals II-3 and III-6.
c. If III-3 and III-4 were to have another child, determine the probability they will have an
affected boy. What is the probability they will have an unaffected child? Show your work.