BIO152H5 Lecture Notes - Lecture 14: Genotype Frequency, Allele Frequency, Gene Flow

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18 Apr 2012
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Lecture 14 - Hardy Weinberg Principle
November 1, 2011
Genetic Variation within Populations
Geographical Variation
Polymorphism
Evolutionary Mechanisms/Processes
Natural selection: increases frequency of certain alleles
Genetic Drift: causes allele frequencies to change randomly
Gene flow: occurs when individuals immigrate into of emigrate from a population;
allele frequencies may change
Mutation: modifies allele frequencies by introducing new alleles
Measuring Variation in a Population
Genetic Variation within Populations
Calculating Allele Frequencies
- Allele frequency: p + q = 1
Genotype Frequency
p^2 - homo dominant
q^2 - homo recessive
2pq - hetero
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