AP Biology 7.4.B: Random Processes in Evolution

Practise AP Biology 7.4.B questions by explaining how mutation, genetic drift and gene flow change allele frequencies in specific populations.

Exam points

explain how mutation creates variation and genetic drift changes allele frequencies in small populations
predict how gene flow between populations affects genetic divergence and long-term variation
use population comparisons to infer random evolutionary change, drift or migration

[Maximum number: 1]

Scientists have found that the existing populations of a certain species of amphibian are small in number, lacking in genetic diversity, and separated from each other by wide areas of dry land. Which of the following human actions is most likely to improve the long-term survival of the amphibians?

Cloning the largest individuals to counteract the effects of aggressive predation

Reducing the population size by one-fifth to decrease competition for limited resources

Constructing a dam and irrigation system to control flooding

Building ponds in the areas of dry land to promote interbreeding between the separated populations

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7.4.B—Describe the role of random processes in the evolution of specific populations question 1