Imagine That You Are Studying a Very Large Population of Moths

question 23

Multiple Choice

Imagine that you are studying a very large population of moths that is isolated from gene flow.A single gene controls wing color.Half of the moths have white- spotted wings (genotype WW or Ww) and half of the moths have plain brown wings (ww) .There are no new mutations,individuals mate randomly,and there is no natural selection on wing color.How will p,the frequency of the dominant allele,change over time?

• A)p will decrease because of genetic drift.
• B)p will neither increase nor decrease; it will remain more or less constant under the conditions described.
• C)p will fluctuate rapidly and randomly because of genetic drift.
• D)p will increase; the dominant allele will eventually take over and become most common in the population.

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