PSYC-2656EL Lecture Notes - Lecture 2: Mendelian Inheritance, Genetic Drift, Convergent Evolution
8 Dec 2016
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Document Summary
Genetic factors interact with environmental factors and can"t be considered separate from each other. The change or creation of a new species over the course of time. Change refers to a change in the genetic code or the allelic frequencies in a population. Darwin"s journey on the beagle (1831-360) to the galapagos islands. Lyell"s book on the principles of geology (small changes happening incrementally produce large changes) Malthus"s essay on the principle of population. Artificial selection by breeders of animals (certain traits could be passed on through inheritable traits) Wallace- came up with the theory of natural selection (never believed it was for humans) Overproduction of offspring by a species (competition) Preferential survival of certain variations (adaptive variations) A way for these variations to be passed on to offspring (heritability) Defined in biology as reproductive success (how many offspring produced) Fitness can only be expressed relative to the alternatives. Fitness of a gene is a function of the environment.
