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Cladograms

Explore the transition from traditional classification to evolutionary grouping through cladograms, highlighting how genetic similarities and molecular clocks are utilized to determine species evolution. Understand how organisms are categorized based on evolutionary descent. Discover the complexity of classification with examples like dolphins fitting into multiple categories.

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Cladograms

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  1. Cladograms

  2. Problems with traditional classification: • Some animals fit into more than one category • Ex. Dolphin – fish (lives in water) or mammal (warm blooded)

  3. Evolutionary Classification: • Organisms grouped showing lines representing evolutionary descent (not just physical similarities)

  4. Cladograms: • Identifies new characteristics that show up as lineages evolve. • Ex:

  5. Genetic Similarities: • “Read” DNA/RNA and compare bewtween organisms • Molecular clocks: used to estimate when 2 species evolved independently • Compare location and amount of mutations in DNA

  6. Cladogram example:

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