18.4 - Different forms of selection

• What are the 3 main types of selection ?

  Stabilising, Directional, Disruptive
• What phenotype does stabilising selection favour ?

  The average phenotype, favours average individuals around the mean
• What phenotypes does stabilising selection select against ?

  The extreme phenotypes
• What phenotype does directional selection favour ?

  Favours phenotypes that vary in one direction from the mean of the population, selects for one extreme phenotype
• What phenotypes does disruptive selection favour ?

  Favours individuals with extreme phenotypes
• What is evolution in terms of allele frequency ?

  A change on the allele frequencies in a population