Mechanisms of Evolution 16.1 Causes of microevolution.

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Presentation transcript:

Mechanisms of Evolution 16.1 Causes of microevolution

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

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

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

Mechanisms of Evolution 16.2 Types of selection

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

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

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

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