1) Joe's grandfather (on his mothers side) was a lizard man on a circus sideshow (the result of rare X-linked recessive allele that gave him a tail). Joe meets and marries Julie, whose uncle on her mothers side had a tail removed at the age of 2. Julie is now pregnant with their first child
a) Assign genotypes.
b) What is the probability that their first child will have a tail?
c) If the first child does have a tail, what is the probability that a second child will have a tail?
2) Achondroplasia (dwarfism) is an autosomal dominant disorder, where individuals homozygous for the mutant allele do not survive
a) if a woman with achondroplasia marries a man of normal height, what proportion of their offspring is expected have achondroplasia?
b) if a woman with achrondroplasia marries a man with achondroplasia , what proportion of their offspring is expected to have achondroplasia?