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Phylogenetic Trees

Phylogenetic Trees. Bellwork - have SLATE out!. Use this diagram to create your family tree. (Add parents, siblings, cousins, aunts, uncles, etc.) As soon as you are finished- head out to lab for the next two evolution evidence stations. Finished early?.

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Phylogenetic Trees

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  1. Phylogenetic Trees

  2. Bellwork-have SLATE out! • Use this diagram to create your family tree. (Add parents, siblings, cousins, aunts, uncles, etc.) • As soon as you are finished- head out to lab for the next two evolution evidence stations

  3. Finished early? • PreAP is ready for a bigger quiz (95% + did very well on natural selection one Wednesday)  play pictionary with a neighbor or quiz each other.ANYthing in notetaker or labs is fair game. • (No dissection info or specific era dates on this quiz)

  4. Phylogenetic Trees • Traditionally classification was based on physical similarities. What does this guy/gal look similar to?

  5. Phylogenetic Trees • Traditionally classification was based on physical similarities. • Physical similarities are not always the result of close relationships. Evolved similar adaptations to a raccoon in different environments…what type of evolution?

  6. Phylogenetic Trees • Modern classification uses molecular biology (DNA) to determine how similar the genes are between species. What does this guy/gal look similar to?

  7. Phylogenetic Trees • Modern classification uses molecular biology (DNA) to determine how similar the genes are between species. What does this guy/gal look similar to?

  8. Phylogenetic Trees • Modern classification uses molecular biology to determine how similar the genes are between species. • Genetic similarities more accurately show evolutionary relationships

  9. Phylogenetic Trees 9. Phylogeny - evolutionary history for group of species. • Uses evidence from • living species, fossil record, & molecular data (DNA) • shown with branching tree diagrams

  10. Phylogenetic Trees Evolution events (new traits or speciation) Oldest Ancestor Different Species

  11. Phylogenetic Trees Speciation is which type of evolution? • Scientists use fossil record, structural comparisons and DNA to construct trees. • Each time a branch divides, it shows emergence of a new species.

  12. Large forehead Which 2 organisms are Most closely related??? Feathers

  13. 6 Large forehead How many species does this phylogenetic tree show??? Feathers

  14. Large forehead • feathers Large forehead Name one of the evolution events Feathers

  15. Sauropods, Theropods & Birds Large forehead Which species have large foreheads? Feathers

  16. # of branches indicates the degree to which 2 organisms are related. Think, are you more closely related to your sibling or your cousin?? Phylogenetic Trees Look back at your family tree…how many branches between you and a cousin?

  17. Automobile phylogenetic tree • ALL vehicles evolved from a PRIMATIVE 4-wheeled ancestor • Work with your partner to create a phylogenetic tree for the vehicles. • Be ready to justify your answers

  18. The Rambler – car with 3 wheels, 4 doors, front and back seat. • The Oxen – car with 4 wheels, 4 doors, front and back seat. • The Dispensor – car with 4 wheels, 2 doors, front seat only. • The Rock – car with 4 wheels, 2 doors, front and back seat, no top. • The Hawk – truck with 4 wheels, 2 doors, 1 seat, 1 short bed. • The Bull – truck with 4 wheels, 2 doors, 1 seat, 1 long bed. • The Redwood – truck with 6 wheels, 2 doors, 1 seat. • The Snake – a truck with 6 wheels, 4 doors, front and back seat.

  19. Closure • What was challenging about the activity? • Is there only one correct answer? Why or why not? • What real life challenges would phylogeneticists face when trying to figure out the evolutionary history for several species?

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