Bis2CFall10.Lecture2.full

Bis2CFall10.Lecture2.full - Lecture 2: BIS 002C...

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Lecture 2: BIS 002C BIODIVERSITY AND THE TREE OF LIFE Lecture 2 Phylogeny 2: Trees, Taxa, and Groups 1
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Where we are going and where we have been • Previous lecture : 1. Introduction and Phylogeny 1 • Current Lecture: 2. Phylogeny 2: Trees, Taxa and Groups • Next Lecture: 3. Phylogeny 3: Characters 2
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Lecture 2 Outline • A. A little video • B. Rotating phylogenetic trees • C. Components of a phylogenetic tree • D. Rotating branches in trees • E. Groupings in trees • F. Relatedness* • G. Polytomies* • * Note these parts may run over into Lecture 3 3
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A. A movie (Will be shown tonight . ..) Movie 4 4
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B. Rotating phylogenetic trees B. Rotating trees 5 5
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a b c d e f g h A model phylogenetic tree 6
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a b c d e f g h A model phylogenetic tree Present Past 6
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a b c d e f g h A model phylogenetic tree Present Past Vertical Tree 6
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a b c d e f g h A model phylogenetic tree Present Past Vertical Tree Draw This Tree 6
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A model phylogenetic tree a b c d e f g h Present Past 7
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A model phylogenetic tree a b c d e f g h Present Past 7
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A model phylogenetic tree a b c d e f g h Present Past 7
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A model phylogenetic tree a b c d e f g h Present Past Horizontal Tree 8
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Horizontal tree Horizontal Tree 9
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Horizontal tree Horizontal Tree 9
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Horizontal tree Horizontal Tree 9
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Horizontal tree Vertical Tree 9
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C. Components of a phylogenetic tree C. Parts of a tree 10 10
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a b c d e f g h A model phylogenetic tree Present Past 11
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A model phylogenetic tree a b c d e f g h 12
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A model phylogenetic tree a b c d e f g h ???? 13
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A model phylogenetic tree a b c d e f g h taxa taxon : any group of species that we designate a name (p543) (e.g., a) taxa : multiple taxons (e.g., a and b) 14
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a b c d e f g h A model phylogenetic tree ???? 15
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a b c d e f g h A model phylogenetic tree nodes f g h i j k 16
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a b c d e f g h A model phylogenetic tree nodes node : (1) common ancestor of taxa “above” the node (e.g., f is common ancestor of a & b) (2) splits in branches from one lineage into more f g h i j k 17
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