In a Sequence of DNA Taken from Various Species of Snails,researchers

question 51

Multiple Choice

In a sequence of DNA taken from various species of snails,researchers have found that the rates of nonsynonymous substitutions and synonymous substitutions are roughly the same.What can we infer from this pattern?

• A) This gene has a high mutation rate.
• B) This gene has a low mutation rate.
• C) Strong stabilizing selection is acting on this gene.
• D) Strong positive selection is acting on this gene.
• E) Most of the amino-acid substitutions at this gene are neutral.

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