BIOL 1020U Lecture Notes - Lecture 2: Population Bottleneck, Stabilizing Selection, Intermediate Frequency

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27 Feb 2016
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Explains how organisms have arisen and diversified from earlier organisms. Evolution is the change over time in allele frequencies in a population of organisms. The theory is a foundation of modern biology, genetics, and ecology. Darwin"s theory: descent with modification by natural selection. In 1844, darwin wrote an essay on the origin of species and natural selection did not introduce his theory publicly. June 1858 - darwin received manuscript from alfred russell wallace: theory of natural selection similar to darwin"s, darwin quickly finished the origin of species and published it the next year. The earth was young (6,000 years old) But there were a few doubts about this. Prevailing views before darwin: aristotle (384-322 b. c, opposed evolution species fixed and unchanging scala naturae. Old testament of the bible: species individually designed by creator and perfect, seemed to corroborate aristotle"s views, many scientists of 1700"s believed that creator had designed each species for a specific purpose.

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