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 second child will develop cystic fibrosis?

A) 25%
B) 50%
C) 75%
D) 100%
E) It depends on which alleles were inherited by their first child.


A

Biology & Microbiology

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