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Understanding Hardy-Weinberg Equilibrium: Genetic Principles and Population Genetics

This lesson introduces the Hardy-Weinberg principle, detailing the relationship between gene pools and allelic frequencies in populations. It outlines how to calculate allelic frequencies and highlights the necessary assumptions for Hardy-Weinberg equilibrium, such as large population size, lack of migration, no mutation, and absence of selection pressures. Through examples and explanations, students will learn the significance of alleles, including dominant and recessive traits, and the conditions under which populations can maintain genetic equilibrium.

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Understanding Hardy-Weinberg Equilibrium: Genetic Principles and Population Genetics

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  1. Genetics Lesson 2 Hardy Weinberg

  2. Hardy Weinberg http://nhscience.lonestar.edu/biol/hwe.html

  3. Genes, Population and Alleles • Is there a relationship?

  4. Gene Pool and Allelic Frequencies • Gene Pool = • Allelic Frequency = • How can we use this information?

  5. Hardy Weinberg • Calculate Allelic frequencies in a given population • If we were to calculate the allelic frequencies what would we need to assume?

  6. Hardy Weinberg- Assumptions • Large population • No migration • No evolution hence no mutation • No selection pressures • No species selection • Allopatric Speciation does not occur

  7. Possibility of Alleles = • Total = 1 • So dominant and recessive alleles =1

  8. Hardy Weinberg • Recessive phenotypes need both RECESSIVE alleles • Homozygous dominant phenotypes need both DOMINANT alleles • Heterozygotes need one of each allele

  9. Hardy Weinberg Examples • Page 127

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