Biology 100 and 101
University of Illinois

Integrative Biology 100
Discussion Class, November 19-21
#13 Micro Evolution

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Learner Objectives

You should be able to:

  1. Explain the effect of mutation and recombination in producing and enhancing genetic variability within a population. (Review meiosis.)

  2. Explain the criteria by which evolutionary fitness is measured and give an example in which one individual might be judged to be more fit than another.

  3. Distinguish between evolutionary changes in a population that involve selection which favors some phenotypes over others and those evolutionary changes that are a result of purely random events.

  4. Illustrate examples of evolution involving directional, disruptive and stabilizing selection.

  5. Compare these situations in which evolution of a population is the result of random events:

      a. bottle neck

      b. gene flow

      c. founder effect

      d. genetic drift (in a population that does not experience gene flow or a drastic reduction in numbers).

      e. compare the evolutionary effects of genetic drift on a small population such as an endangered species with the effects on a very large, robust population.

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