Trees A - Lecture 6 Phylogenetic trees Reading Ch 26...

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10/15/09 1 Lecture 6 Phylogenetic trees Reading Ch 26 Overview I. What is a phylogeny? II. History III. How do we read trees? IV. How do we build trees? A. characters B. reasons for similarities 1. homology 2. homoplasy 3. shared & derived homologies C. tree building techniques 1. outgroup comparisons 2. parsimony V. Why are phylogenies useful? VI. Molecular clocks I. Phylogeny = evolutionary history of a group of species Phylogenetic tree – picture of that evolutionary history *branching diagram *shows relationships among taxa *recency of common ancestor Phylogenetic trees - must be inferred Reconstructing the past we didn’t see Hypothesis Systematists, systematics Use all possible types of data external and internal morphology behavior cell structure chromosome # nucleotide sequences in DNA
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10/15/09 2 II. History the classification of organisms – old Carolus Linneaus (1707-1778) Swedish botanist binomial naming system hierarchical categorization point - understand God’s plan
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This note was uploaded on 12/02/2009 for the course BILD BILD 3 taught by Professor Woodruff during the Fall '08 term at UCSD.

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Trees A - Lecture 6 Phylogenetic trees Reading Ch 26...

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