0: The Species Scape

24/11/03


Click here to start


Table of Contents

0: The Species Scape

2:Two types of evolutionary change

PPT Slide

4: Examples of isolation

5: Geography of speciation

6: Allopatric speciation

6a: Allopatric speciation

7: Geographic isolation

8. Geographic differentiation

11. Founder event speciation

Allopatric speciation: the same event can affect many lineages at once

12: Allopatric speciation may affect many lineages at the same time

13: Host-parasite cospeciation

14: Sympatric speciation

15: Normal sexual reproduction (meiosis reduces the number of sets of chromosomes)

16: Autopolyploidy (meiosis fails)

17: Why is it a new species?

PPT Slide

19: Allopolyploidy has been important in wheat evolution

20: Hybridisation in animals

Diversifying selection

22: Types of selection

23:Disruptive (=diversifying) selection and speciation

24: Apple maggot fly (Rhagoletis)

Is it really sympatric speciation?

25: Cichlid fish in African lakes: sympatric or allopatric speciation?

27: Summary

Author: Roderic D. M. Page

Email: r.page@bio.gla.ac.uk

Download presentation source