1. American cat breeders are trying to establish a new breed of cat with unusual, curled-back ears, to be known as the "curl cat." Suppose you found a curl cat and wanted to secretly start your own population. How would you determine whether the curl allele is dominant or recessive? How would you establish and maintain a true breeding population based on whether the allele is dominant or recessive? 

2. Phenylketonuria (PKU) is one of the most common, recissive genetic disorders in humans. Infants with PKU are missing an enzyme called phenylalanine hydroxylase, needed to break down an amino acid called phenylalanine. If a strict diet that minimizes the amount of phenylalanine in the diet is not followed, a severe nervous disorder may result. If two heterozygous parents (Pp) have a child, what is the possible genotype and phenotype for this individual?