Class notes
Biol 1107 Unit 5 Part 2 Notes
- Course
- BIOL 1107
- Institution
- University Of Georgia
Detailed notes on unit 5 Part 2 for Biol 1107. *Enjoy!!
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Biology 1107 Unit 5 NotesEvolution
Part 2
Class Notes (Evolution Mechanisms)
- Genetic Drift
- Genetic drift includes any changes in allele frequencies of a population due to
random events, which could be just about anything from gamete sampling to
natural disasters
- The founder effect refers to changes in allele frequencies when new populations
arise
- The new population is likely to be different genetically than the original
population
- The bottleneck effect refers to changes in allele frequencies due to severe
population losses
, - The random survivors are not likely to be representative of the original
population
- Selection
- Selection occurs when individuals that have certain heritable traits produce more
fertile offspring than individuals without the traits
- natural selection
- artificial selection
- sexual selection
- Fitness is the ability of an individual to have fertile offspring relative to other
individuals
- Artificial Selection
- Any selection as a result of humans
- Ex) selective breeding and corn
- Dogs are also an example as they are descendants of an extinct wolf species
- Natural Selection
- From Charles Darwin
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