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Population Genetic and Evolution
- Evolution is a change in the genetic composition of a population over time. Natural selection is one mechanism for evolution.
- Genetic drift is the change in allele frequency due random chance and usually occurs in small populations. The founder effect and the bottleneck effect are examples of genetic drift.
- The movement of alleles into or out of a population is called gene flow and can result in a change in the frequency of alleles.
- The Hardy-Weinberg Equation, p2 + 2pq + q2 = 1, can be used to predict the frequencies of alleles and genotypes in populations that meet the following conditions:
- Mating is random
- No mutations occur
- No natural selection is occurring.
- The population is large.
- There is no immigration or emigration.
Population Genetic and Evolution
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
- Intro
- Review of Natural Selection
- Genetic Drift and Gene Flow
- Definition of Genetic Drift
- Example of Genetic Drift: Cholera Epidemic
- Genetic Drift: Founder Effect
- Genetic Drift: Bottleneck Effect
- Gene Flow
- Quantifying Genetic Variation
- Maintaining Genetic Variation
- Heterozygote Advantage
- Example of Heterozygote Advantage: Sickle Cell Anemia
- Diploidy
- Geographic Variation
- Frequency Dependent Selection and Outbreeding
- Neutral Traits
- The Hardy-Weinberg Equilibrium
- The Hardy-Weinberg Equilibrium
- The Hardy-Weinberg Conditions
- The Hardy-Weinberg Equation
- The Hardy-Weinberg Example
- Example 1: Match Terms to Descriptions
- Example 2: The Hardy-Weinberg Equilibrium
- Example 3: The Hardy-Weinberg Equilibrium
- Example 4: Maintaining Genetic Variation
































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