Selection and Hardy-Weinberg
- Created by: Natasha McGregor
- Created on: 30-11-13 12:55
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- Selection and Hardy-Weinberg
- Selection
- Directional
- In response to environmental change
- Individuals with an extreme type of allele for characteristic survive
- Stabilising
- No environmental change
- Reduce possible phenotypes
- Individuals with alleles towards the middle are most likely to survive
- The choice of one characteristic over another as it is more beneficial to survive
- Directional
- Hardy-Weinberg Principle
- Frequency of dominant allele = p Frequency of recessive allele = q
- p + q = 1
- p2 + 2pq + q2 = 1
- No mutations arise
- The population is isolated, there is no flow of alleles into or out of the population
- The population is large
- There is no selection, all alleles are equally likely to be passed to the next generation
- Mating within the population is random
- p2 = frequency of homozygous dominant organisms
- q2 = frequency of homozygous recessive organisms
- 2pq = frequency of heterozygous organisms
- Selection
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