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Transcript
Name: _________________________ Question Set 39 CHAPTER 21.2: Mechanisms of Evolution 1. Why is genetic variation important to evolution? _____________________________________________________________________________ _____________________________________________________________________________ 2. How does each of the following break Hardy-Weinberg assumptions? a. mutation: ___________________________________________________________ _______________________________________________________________________ b. gene flow: ___________________________________________________________ _______________________________________________________________________ c. genetic drift: _________________________________________________________ _______________________________________________________________________ d. nonrandom mating: ___________________________________________________ _______________________________________________________________________ 3. How does genetic drift apply to each of the following? Give an example of each. a. Founder Effect: _______________________________________________________ _______________________________________________________________________ b. Bottleneck Effect: _____________________________________________________ _______________________________________________________________________ 4. Define fitness (as it is used in evolutionary biology). _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Page 1 of 2 Name: _________________________ Question Set 39 5. Distinguish between the three types of selection illustrated in these graphs of the distribution of coat color in mice. 6. Describe two examples of documented cases of selection in natural populations which have resulted in evolutionary change of a population. a. ____________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ b. ____________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ 7. For each of the following, give an example or describe what is meant by the statement. a. Natural selection cannot fashion perfect organisms: __________________________ _______________________________________________________________________ _______________________________________________________________________ b. Not all evolution is adaptive: _____________________________________________ _______________________________________________________________________ _______________________________________________________________________ c. Selection can only edit existing variations: _________________________________ _______________________________________________________________________ _______________________________________________________________________ Page 2 of 2
