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Cystic Fibrosis Is Caused by the Allele F, Which Is

Question 12

Multiple Choice

Cystic fibrosis is caused by the allele f, which is completely recessive to the normal dominant allele F. Consider a couple who both have the genotype Ff. What is the chance that their first child will develop cystic fibrosis?


A) 0%
B) 25%
C) 50%
D) 75%

Correct Answer:

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