Phylogenetics - Phylogenetics Phylogeny_ The evolutionary...

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1 Phylogenetics Phylogenetics Phylogeny_____ The evolutionary history of a species or group of related species Outline Outline c Key concepts c Binomial c Classification categories c Three domains and six kingdoms c Understanding Phylogenies c Examples of Using Phylogenetis c Key Terms c Conclusions Key Concepts: c Phylogeny _____ The evolutionary history of a species or group of related species c Systematics Field of biology that deals with the diversity of life. Systematics is usually divided into the two areas of Phylogenetics and Taxonomy . c Taxonomy is the science of describing, naming, and classifying organisms c Classification is the arrangement of organisms by their physical similarities, which reflect historical and evolutionary relationships
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2 Key Concepts: c Phylogenetics -- Field of biology that deals with the relationships between organisms. It includes the discovery of these relationships, and the study of the causes behind this pattern Binomial Binomial c Millions of kinds of organisms exist c In 18 th Carolus Linneaus developed modern binomial nomenclature – Each species has two unique names – hence binomial Genus Specific epithet – Each is italicized or underlined – Genus name is capitalized; species name is not
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3 Texas Bluebonnet Lupinus texensis / Lupinus texensis c The Linnean system, first formally proposed by Linneaus in Systema naturae in the 18th century, has two main characteristics. Each species has a two-part name. Species are organized hierarchically into broader and broader groups of organisms. Taxonomy employs a Taxonomy employs a hierarchical system of hierarchical system of classification classification
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Taxonomic Taxonomic Levels Levels c Domain c Kingdom c Phylum c Class c Order c Family c Genus c Species Here, domestic cat Classification Schemes Reflect Scientific Classification Schemes Reflect Scientific Knowledge and Technology Knowledge and Technology 1 Prior to 1970: two-kingdom system Plants and animals 2 1969: Roger Whittaker-five-kingdom system Monera, Protista, Fungi, Plantae, Animalia 3 Recent proposal: Carl Woese-three-domain system Bacteria, Archaea, Eukarya How Many Kingdoms? How Many Kingdoms?
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This note was uploaded on 02/16/2010 for the course BIO 49970 taught by Professor Chinnery during the Spring '10 term at University of Texas at Austin.

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Phylogenetics - Phylogenetics Phylogeny_ The evolutionary...

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