You Are Studying Snails and Find That Individuals Have Shells

question 22

Multiple Choice

You are studying snails and find that individuals have shells that coil either to the right or to the left. Which of the following is/are the most plausible explanation(s) for this variation?

• A) Different alleles at a single locus produce the different phenotypes.
• B) Individuals are genetically identical, but certain environmental conditions trigger the production of each coil type.
• C) This is a quantitative trait, meaning that many loci contribute to the phenotypic differences.
• D) a and b
• E) a, b, and c

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