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Speciation

Speciation. By J. Chen. Same species?. Yes - Homo Sapien. Same species?. Rose – Rosa Tulip - Tulipa. Same species?. Wood mouse – A. sylvaticus Common brown rat - norvegicus. What is a species?. Species are populations of organisms that can produce offspring under natural conditions

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Speciation

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  1. Speciation By J. Chen

  2. Same species? Yes - Homo Sapien

  3. Same species? Rose – Rosa Tulip - Tulipa

  4. Same species? Wood mouse – A. sylvaticus Common brown rat - norvegicus

  5. What is a species? • Species are • populations of organisms that can produce offspring under natural conditions • reproductively isolated from other species • Reproductively isolated means…..

  6. Are lions and tigers the same species? Lion • Kingdom: Animalia • Phylum: Chordata • Class: Mammilia • Order: Carnivora • Family: Felidae • Genus: Panthera • Species: P. Leo Tiger • Kingdom: Animalia • Phylum: Chordata • Class: Mammilia • Order: Carnivora • Family: Felidae • Genus: Panthera • Species: P. Tigeris

  7. Reproductive Isolation Lion – P. Leo Tiger – P. Tigeris

  8. Liger

  9. Are humans and monkeys the same species? Human • Kingdom: Animalia • Phylum: Chordata • Class: Mammilia • Order: Primates • Family: Hominidae • Genus: Homo • Species: H. Sapiens Ape • Kingdom: Animalia • Phylum: Chordata • Class: Mammilia • Order: Primates • Family: Haplorrhini • Genus: Many different kinds • Species: Many different kinds

  10. How do new species form? • Environment: Grassland

  11. How do new species form? • There are two varieties of rabbits: fur and no fur. • FF Fur • Ff Fur • ff No fur

  12. How do new species form? EARTHQUAKE!

  13. North Pole • Environment • What will happen to the fur bunnies? • What will happen to the no fur bunnies?

  14. Equator • Environment • What will happen to the fur bunnies? • What will happen to the no fur bunnies?

  15. Over millions of years…..

  16. Over millions of years…..

  17. Summary • Explain how a new species can form. Include the word “reproductive isolation”

  18. Genetic Drift

  19. Genetic Drift • Genetic drift is when allele frequencies change due to CHANCE • Unlike natural selection, genetic drift does not produce adaptations because an individual survival is purely due to chance. • Genetic drift DECREASES diversity.

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