Chapter 6 Outline

Genotypes and Phenotypes

Fitness Functions Describe Selection

on Quantitative Traits

Measuring the Strength of Directional Selection

Evolution by Directional Selection

  • When genes interact: Dominance and epistasis
  • Adaptation from standing genetic variation versus new mutations
  • Can adaptation rescue species from extinction?

Artificial Selection

Correlated Traits

  • Constraints and trade-offs
  • The causes of genetic correlations

Phenotypic Plasticity

The Genetic Architecture of

Quantitative Traits

  • Quantitative trait loci
  • The genetics of quantitative traits