Bio Lecture 5 - Reconstructing Lifes Genealogy 1. Anatomy...

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Chapter 25, Online lecture module 2 Reconstructing Life’s Genealogy 1. Anatomy of a Phylogeny 2. Constructing a Phylogeny 3. Human Phylogeny and Origins • Tips (A - F) = Phylogeny: the history of relationships among organisms; portrayed in a tree. A B C D E F G H I J K time 1. Anatomy of a phylogenetic tree taxa (individuals, species, genera.) •G-K= nodes (evolutionary split); ancestral taxa •G= root ; common ancestor of all taxa in the tree • Clade : all descendants of a specified ancestor A B C D E F G H I J K time • degree of relatedness is depicted by: how recently taxa shared a common ancestor Relatedness
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• each taxon has a combination of ancestral & derived characteristics • characteristics shared with the common ancestor are: ancestral’ • characteristics differing from the ancestor are: derived’ A B C D E F G H I J K time h hi gg f f f e e e Ancestral vs derived 2. Constructing a Phylogeny • Use a reduced version of the vertebrate phylogeny presented in Chapter 25 A. Select a group whose phylogeny is to
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This note was uploaded on 12/08/2011 for the course BIOL 1030 taught by Professor Ferguson during the Fall '09 term at University of Guelph.

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Bio Lecture 5 - Reconstructing Lifes Genealogy 1. Anatomy...

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