Today is the day of the midterm test in my course on molecular evolution. Here's one of the possible question on the test. Almost every student should get full marks on this one.
Imagine that a new mutation gives rise to a beneficial allele with a selection coefficient of 0.1 (s = 0.1) . What is the normal fate of this allele in a population of 10,000 individuals? Explain your answer.Sandwalk readers should try and put this selection coefficient into perspective. It's probably at the high end for new beneficial alleles. What this means is that most adaptive explanations need to postulate a significant benefit to each individual in order to make the probability of fixation come out to some reasonable number.
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