Psyc-evolutionary_and_biological_3 - Psyc 26 August 2008...

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Psyc 26 August 2008 Evolutionary and biological explanations of behavior ****This lecture covers Gleitman Chapter 2 p. 39-49 and 67-75 (Omit 50-66) Side Notes: Operational – quantity measure Correlation of 0 = scattered Evolutionary psychology Emphasizes behavior as an important contributor to an organism’s survival and ability to successfully reproduce Behavior is subject to natural selection Psychological mechanisms that are adaptive: Fears, and phobia (e.g. snakes, heights, etc.) Color vision Darwin and the theory of evolution Limited resources, only some individuals survive Specifically, some survive long enough to reproduce (and pass along their genes), while others do not Natural selection Natural selection: the process that favors individuals that are best equipped to survive and reproduce in their environment Variation: individuals are different from one another Galapagos Islands: widely varied vegetation and environ from island to island Variations can lead to reproductive advantages (or disadvantages) Which variations are beneficial depends upon the environ in which the organism lives -variations that are advantageous in one environ might not be in a different environ DNA, genes, and chromosomes DNA: molecules that make up genes -Structure of DNA has blueprint for building all of the structures and processes of the body Genes are stored in chromosomes -23 pairs of chromosomes -Get one member of each pair from each parent Genes occupy a specific position on the chromosome—the partner gene on the other chromosome
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Psyc-evolutionary_and_biological_3 - Psyc 26 August 2008...

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