Chapter 25 Chapter Outline

Development and Evolution: Developmental Mechanisms of Evolutionary Change

THE DEVELOPMENTAL GENETIC MODEL OF EVOLUTIONARY CHANGE

Preconditions for Evolution: The Developmental Structure of the Genome

  • Modularity: Divergence through dissociation
  • Molecular parsimony: Gene duplication and divergence

Mechanisms of Evolutionary Change

  • Heterotopy
  • Heterochrony
  • Heterometry
  • Heterotypy

Developmental Constraints on Evolution

  • Physical constraints
  • Morphogenetic constraints
  • Pleiotropic constraints and redundancy

ECOLOGICAL EVOLUTIONARY DEVELOPMENTAL BIOLOGY

Plasticity-First Evolution

  • Genetic assimilation in the laboratory
  • Genetic assimilation in natural environments

Selectable Epigenetic Variation

Evolution and Developmental Symbiosis

  • The evolution of multicellularity
  • The evolution of placental mammals

Coda

Back to top