Lecture 8 Units of evolution
A hierarchy of selection <ul><li>G = Generate </li></ul><ul><li>T = Test </li></ul><ul><li>R = Regenerate </li></ul><ul><l...
Selection Selection is a feedback cycle that passes variants through a “fitness filter”.
Many and the Many
Individuals 1
Individuals 2
Individuals 3
Individuals 4
Populations and selection Disruptive selection occurs when a curve becomes bimodal and adjusts to more than one fitness pe...
Adaptive zones
Lineages
Hennig’s view
Historical trees and cladograms
Cladistic terms
The Dual Hierarchy, revised
Weismannian inheritance
Lamarckian evolution
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Units of evolution

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Units of evolution

  1. 1. Lecture 8 Units of evolution
  2. 2. A hierarchy of selection <ul><li>G = Generate </li></ul><ul><li>T = Test </li></ul><ul><li>R = Regenerate </li></ul><ul><li>= Locus of selection </li></ul><ul><li>“ GTR” is a way of characterising a selection process, by Henry Plotkin </li></ul>
  3. 3. Selection Selection is a feedback cycle that passes variants through a “fitness filter”.
  4. 4. Many and the Many
  5. 5. Individuals 1
  6. 6. Individuals 2
  7. 7. Individuals 3
  8. 8. Individuals 4
  9. 9. Populations and selection Disruptive selection occurs when a curve becomes bimodal and adjusts to more than one fitness peak.
  10. 10. Adaptive zones
  11. 11. Lineages
  12. 12. Hennig’s view
  13. 13. Historical trees and cladograms
  14. 14. Cladistic terms
  15. 15. The Dual Hierarchy, revised
  16. 16. Weismannian inheritance
  17. 17. Lamarckian evolution

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