If Genetic Drift Is Not Accompanied by Natural Selection,mutation,or Migration,then

question 20

Multiple Choice

If genetic drift is not accompanied by natural selection,mutation,or migration,then the frequencies of alleles will "wander" between 0 and 1.Using the accompanying figure,which of the following is an accurate statement?

• A) Random sampling error generates fluctuations in allelic frequencies over generations, so all populations-both simulated and real-have been found to follow the same evolutionary trajectory.
• B) The effects of genetic drift are more immediate, and more pronounced, on small population sizes.
• C) Genetic drift will have no long-term effect on allelic frequencies if the population numbers more than 40 individuals.
• D) None of these is an accurate statement.

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