Cystic fibrosis (CF)is caused by a recessive allele.A child has CF,even though neither of his parents has CF.This couple also has a child who does not have CF.What is the probability the unaffected child is heterozygous?

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The Answer of Cystic fibrosis (CF)is caused by a recessive allele.A child has CF,even though neither of his parents has CF.This couple also has a child who does not have CF.What is the probability the unaffected child is heterozygous?

Cystic Fibrosis (CF)is Caused by a Recessive Allele