Phylogeny Evolutionary history of a species

Taxonomy Classification of organisms Binomial nomenclature Taxons Genus species Ex. Panthera leo Homo sapiens Taxons DKPCOFGS

Phylogenetic Tree Purpose is to show lines of descent Does not reflect absolute age Cannot assume neighboring taxons evolved from one another

Daily Warm-up January 30th Percy Jackson and Annabeth are trying to figure out what a griffin’s proper scientific name would be. What would they be looking for? Please make a scientific name up using the correct format. HW: -Read 20.2 Turn in: -Test corrections if haven’t already

How Phylogenetic Trees are Created 1. Molecular DNA 2. Morphological Physical appearance and structures Ex. Homologous structures Need to be able to distinguish from analogous structures- these do not reflect evolutionary relationships

Cladistics and Cladograms Type of phylogenetic tree Places members into groups (clades) based on homologies

Characters (traits) Shared ancestral character Shared derived trait Backbone in mammals Found in ancestor Shared derived trait Mammary glands Unique trait to mammals

Making a Clade Use an outgroup Diverged before line of species of interest (ingroup)

Timing in Phylogenetic Trees Some trees can indicate evolutionary change and time

Time