Biology 1001A Lecture Notes - Lecture 19: Symplesiomorphy, Ingroups And Outgroups, Synapomorphy
10 May 2016
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Lecture 19 notes - phylogeny: reading phylogenies. Phylogeny > a description of evolutionary relationships between living things represent the evolutionary histories with a tree . Time moves from the base (roots) towards the tips. Each branch represents a speciation event > most recent time a two species shared a common ancestor. D+ e closely related than to any of the other groups. A is not closely related to any of the other species. Even though different shapes, they are all saying the same thing. Some phylogenies convey more information than branching order. Do these phylogenies convey the same information: yes, no. > humans and birds are each other"s closest rela- branching events that we care about) > both phylogenies are saying the same message. Do these phylogenies convey the same information? a) yes: no tives (sequence of in one, the bat is more closely related to chipmunk, but in the other the bat is more closely related to bats.
