BIO153H5 Lecture Notes - Lecture 4: Phylogenetic Tree, Ion, Polytomy
Document Summary
Bio 153 lecture notes (four) thursday, january 14, 2016. We have an effective nomenclature: only one species should have only one name. Trees are an effective way to think about descent from common ancestor. More like a street you can walk down to get to different species: lamarck, darwin. Similar to family tree: been down for centuries, therefore, phylogenetic tree idea isn"t too new or different, what are the differences between phytogenic trees and family tree. In a family tree, only looking at one species, homosapians (humans) and in family trees, it goes down by generations (in terms of decades) In phylogenetic trees, we do not plot individuals but species and it goes down thousands of years. Trees can reflect classification: overlay basically the same graph cation into tree, ex. : coyotes and dogs belong to the same family then genus separates the two phylogenetic tree: we can represent the very system we use for classification on a.
