Cystic fibrosis is caused by a recessive gene. If C = normal and c = cystic fibrosis, how can a child with cystic fibrosis have two parents who do not have cystic fibrosis?
A)The child has a genotype of CC. B)The parents have genotypes of CC and Cc. C)The parents have genotypes of Cc and Cc. D)The child has a genotype of Cc.