Download QS039--Ch21--Mechanisms of Evolution

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Transcript
Name: _________________________
Question Set 39
CHAPTER 21.2: Mechanisms of Evolution
1. Why is genetic variation important to evolution?
_____________________________________________________________________________
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2. How does each of the following break Hardy-Weinberg assumptions?
a. mutation: ___________________________________________________________
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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: _______________________________________________________
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b. Bottleneck Effect: _____________________________________________________
_______________________________________________________________________
4. Define fitness (as it is used in evolutionary biology).
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
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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: _________________________________
_______________________________________________________________________
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