In the pedigree shown, the presence of a dominant autosomal genetic disorder is indicated by a shaded box. this is an autosomal inheritance, not a sex-linked trait.

part a: determine whether or not either of the parents (1 or 2) could be homozygous for the trait in question. explain your answer in 1-2 complete sentences. (2 points)

part b: “person 8” does not want to see the disorder passed on to his offspring. he does, for certain, what to get married and have children biologically. if you were a genetic counselor, what advice would you give to him about his odds on having a child with the genetic disorder if he:

(a) married a woman who is heterozygous for the condition and

(b) married a woman who does not have the genetic disorder. (2 points)