6.2.12(The Hardy-Weinberg principle)

State what the Hardy Weinberg principle predicts

• It predicts that the frequencies of alleles in a population will not change from one generation to the next

• If the frequencies do change between generations in a large population, then there is a pressure

State the conditions needed for the Hardy Weinberg principle

• Large population

• Needs to be random mating

• No immigration or emigration

• No mutations

• No natural selection

State what the Hardy Weinberg principle assumes

• The population is large enough to make sampling error negligible

• Mating within the population occurs at random

• There is no selective advantage for any genotype and hence no selection

• There

State the 2 hardy Weinberg equations and define each term in both Hardy Weinberg equation

• p + q=1

  • p = frequency of dominant allele

  • q = frequency of recessive allele

• p² + 2pq + q² =1

  • p² = frequency of homozygous dominant genotype

  • 2pq = frequency of heterozygous genotype

  • q² = frequency of homozygous recessive genotype