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Level 3: Genetic Drift
- Identify the “Golden Nuggets”
- Both: affect outcome of a population.
- Natural selection
- When a species adapts to an environment
- Selective and fitness.
- Increases genetic variation.
- acts on the phenotype.
- more or less common in a population
- Selective and fitness.
- When a species adapts to an environment
- Genetic drift
- Depends on population size, and has the most
impact on smaller populations. Reduces genetic
variation. Depends on environment. (Random)
- Depends on population size, and has the most
impact on smaller populations. Reduces genetic
variation. Depends on environment. (Random)
- Both: affect outcome of a population.
- Founder Effect
- comes from a small population, which is
originally bigger than the new population
- comes from a small population, which is
originally bigger than the new population
- Bottleneck
- starts with a large population and is reduced down drastically then raised up.
- starts with a large population and is reduced down drastically then raised up.
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