What does a person who has cystic fibrosis, a life-threatening lung disease, have in common with a person who has a cleft chin?
a. They both received their condition from the genes passed from their mother.
b. They both received their condition as a result of a dominant set of gene alleles.
c. They both received their condition from a single gene pair.
d. They both received their condition as a function of mitotic mutation.
Answer: C
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