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

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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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