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Microevolution - Changes in the genes of populations

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Presentation on theme: "Microevolution - Changes in the genes of populations"— Presentation transcript:

1 Microevolution - Changes in the genes of populations

2 Macroevolution The appearance of new species over time “Speciation”

3 Patterns of Natural selection

4 If the Siberian Husky had heavier muscles, it would sink deeper into the snow, so they would move slower or would sink and get stuck in the snow. Yet if the Siberian Husky had lighter muscles, it would not be strong enough to pull sleds and equipment, so the dog would have little value as a working dog

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6 Peppered Moth: Biston betularia
Industrial melanism study by Kettlewell

7 Natural Selection

8 Migration

9 Mate Choice

10 Mutations

11 Genetic Drift

12 Convergent Evolution Convergent evolution

13 Coevolution - Evolution of Camouflage
Mantis:mimicry

14 Orchid and Bee: coevolution http://www. pbs
example of mimicry in which the orchid has evolved to resemble a female bee

15 Crab spider:

16 Adaptive Radiation

17 Extinction

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