In the Case of the Schallers,why Doesn't Their Genotype Correlate

question 53

Multiple Choice

In the case of the Schallers,why doesn't their genotype correlate with their phenotype?

• A) Although each carries a copy of a mutated CF gene,they also express a normal copy of the CF gene that renders them phenotypically normal.
• B) The Schallers have only normal,nonmutated copies of the CF gene.
• C) The Schallers inherited one mutated and one normal CF gene.
• D) None of the above.
• E) A and C.