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11u bio div 04

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  • Rank – FamilyTaxon - Cervidae
  • Transcript

    • 1. Phylogeny and Modern Taxonomy
    • 2. PhylogenyHumans have family trees that go back for manygenerations to show our lineage and our ancestors.These family trees show how 2 people may be relatedto each other and by how many generations.
    • 3. PhylogenyPhylogenetic trees share the same idea as familytrees. They show how species have grown apart(evolved) over time.
    • 4. PhylogenyPhylogenetic trees share the same idea as familytrees. They show how species have grown apart(evolved) over time.
    • 5. PhylogenyPhylogeny: the study of the evolutionary relatednessbetween and among species.
    • 6. Phylogeny (Draw This)A phylogenetictree is oftenused to illustratetheserelationships.
    • 7. PhylogenyPresent Branches are Many Common Years Ancestors Ago
    • 8. Phylogeny: CladesA clade is a branch of a phylogenetic tree thatrepresents all of the organisms that share a singlecommon ancestor.
    • 9. Phylogeny: CladesClades can be any size, and occur at branches inphylogenetic trees.
    • 10. Phylogeny: CladesIdentify aclade in thistree.
    • 11. Phylogeny: Clades
    • 12. Phylogeny: Clades
    • 13. Phylogeny: Clades
    • 14. Phylogeny: Clades
    • 15. Phylogeny: Clades
    • 16. Phylogeny: Clades
    • 17. Phylogeny: Clades
    • 18. Phylogeny: Clades
    • 19. Phylogeny: Clades
    • 20. • To which other organism is Cervus elaphus most closely related? At what rank and taxon are they related?
    • 21. Modern Taxonomy: Think. Pair. ShareWhat are the drawbacks of traditional taxonomy?- dichotomous keys may be ambiguous or subjective.- following a dichotomous key takes time.- mutations may lead to incorrect classification.
    • 22. Modern Taxonomy: Think. Pair. ShareWhat are the drawbacks of traditional taxonomy?- different genetic structures may lead to similarphysical structures.- evolutionary relatedness is only a guess usingphysical features.
    • 23. Modern Taxonomy: Think. Pair. ShareHow can all of these obstacles be overcome?
    • 24. Modern TaxonomyHow can all of these obstacles be overcome?By collecting and comparing DNA samples of specimens,their identity and evolutionary relatedness can bedetermined efficiently and accurately.
    • 25. DNA Barcoding