Zoe has cystic fibrosis. Which of the following is themost likely explanation?a. Zoe probably inherited one faulty allele from herfather, who is a carrier, and one normal allelefrom her mother.b. Zoe probably inherited one faulty allele from hermother, who must also have cystic fibrosis, andone normal allele from her father.c. Zoe must have inherited faulty alleles from bothparents, both of whom must also have cysticfibrosis.d. Zoe must have inherited faulty alleles from bothparents, both of whom are carriers.

Question

Zoe has cystic fibrosis. Which of the following is the
most likely explanation?
a. Zoe probably inherited one faulty allele from her
father, who is a carrier, and one normal allele
from her mother.
b. Zoe probably inherited one faulty allele from her
mother, who must also have cystic fibrosis, and
one normal allele from her father.
c. Zoe must have inherited faulty alleles from both
parents, both of whom must also have cystic
fibrosis.
d. Zoe must have inherited faulty alleles from both
parents, both of whom are carriers.

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