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Mechanisms of Evolution 16.1 Causes of microevolution.

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Presentation on theme: "Mechanisms of Evolution 16.1 Causes of microevolution."— Presentation transcript:

1 Mechanisms of Evolution 16.1 Causes of microevolution

2 What is microevolution?  Evolution within a population  Example: industrial melanism  Best current day examples  antibiotic resistance  Flu virus

3 What are some causes of microevolution—1?  Genetic mutations  Increases diversity  Gene flow  More gene flow = less diversity  Nonrandom mating  Inbreeding decreases diversity  Assortative mating  Sexual selection  Genetic drift  Random change in allele frequencies

4 What are some causes of microevolution—2?  Bottleneck effect  Antibiotic resistance  Founder effect MRSA infection

5 Mechanisms of Evolution 16.2 Types of selection

6 What are the three types of natural selection—1?  Review on your own the requirements of natural selection  Directional  Stabilizing  Disruptive

7 What are the three types of natural selection—2?  Stabilizing selection

8 What are the three types of natural selection—3?  Disruptive selection


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