mechanisms of evolution 16.1 causes of microevolution
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