Lecture_7_phylogenetics

Ng bat asiac shrew long clawed shrew mole small

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Unformatted text preview: •  For roughly 100 years scien?sts were unable to figure out which family the giant panda belongs to •  Giant pandas look like bears but have features that are unusual for bears and typical for raccoons, e.g., they do not hibernate •  In 1985, Steven O’Brien and colleagues solved the giant panda classifica?on problem using DNA sequences and algorithms 2 9/16/13 Sequence Topology Evolu?onary Tree of Bears and Raccoons Perissodactyla Donkey Horse Indian rhino White rhino Grey seal Harbor seal Dog Cat Blue whale Fin whale Sperm whale Hippopotamus Sheep Cow Alpaca Pig Liele red flying fox Ryukyu flying fox Horseshoe bat Japanese pipistrelle Long- tailed bat Jamaican fruit- ea?ng bat Asia?c shrew Long- clawed shrew Mole Small Madagascar hedgehog Aardvark Elephant Armadillo Rabbit Pika Tree shrew Bonobo Chimpanzee Man Gorilla Sumatran orangutan Bornean orangutan Common gibbon Barbary ape Baboon White- fronted capuchin Slow loris Squirrel Dormouse Cane- rat Guinea pig Mouse Rat Vole Hedgehog Gymnure Bandicoot Wallaroo Opossum Platypus Theory of Evolu?on Carnivora Cetartiodactyla Chiroptera Moles+Shrews Afrotheria Xenarthra Lagomorpha + Scandentia Primates Rodentia 1 Rodentia 2 14 Hedgehogs Basic Assump?ons •  Specia?on is the evolu?onary process by which a new species arises •  It is a very deep concept in biology •  Specia?on events lead to crea?on of different species •  Specia?on caused by physical separa?on into groups where...
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