Tony, who is not diseased, has a sister with cystic fibrosis (CF). Neither of his parents has CF. Tony is expecting a child with Tina. Tina's family history is unknown. Draw a pedigree that includes all of this information. Below each person in the pedigree, write his or her genotype or possible genotypes, using A for the normal CF allele and a for the disease-causing recessive allele.

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The Answer of Tony, who is not diseased, has a sister with cystic fibrosis (CF). Neither of his parents has CF. Tony is expecting a child with Tina. Tina's family history is unknown. Draw a pedigree that includes all of this information. Below each person in the pedigree, write his or her genotype or possible genotypes, using A for the normal CF allele and a for the disease-causing recessive allele.

Tony, Who Is Not Diseased, Has a Sister with Cystic