Cystic Fibrosis Is a Fatal Lung Condition That Results from a Recessive

question 34

Multiple Choice

 Cystic fibrosis is a fatal lung condition that results from a recessive gene. If one parent is a healthy carrier for the condition while the other is not a carrier, what is the likely outcome for any children they might have?

• A) The children will be heterozygous for cystic fibrosis, and all will develop the disease.
• B) Fifty percent of their children will develop the disease, and the other fifty percent will be carriers.
• C) None of the children will have the disease, and none will be carriers.
• D) None of the children will have the disease, but each child has a fifty percent chance of being a carrier.

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