Jan24anbhPOST - Tinbergens 4 Levels of Explanation A....

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I. Tinbergen’s 4 Levels of Explanation A. Practice B. Function and Evolut. Hist. Not Always the Same II. Development as Gene-Environment Interaction A. Nature-nurture Controversy Dead? B. Alcock’s Intro. to Chapter 3 C. An Example --- Dogs 1. Sources of Problem Behaviors 2. History of Dogs, and Artificial Selection
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Please break into groups… 1. Fill in your sheet on ‘Tinbergen’s 4’. Ask me for help, feedback. 1. Can you think of any specific examples for which current function of a behavior or structure is DIFFERENT from its evolutionary history? Why do we eat sweet foods? Function is to provide energy Wings on penguins? Maybe used to fly, now used for swimming Appendix? Used to need for microbial fermentation, don’t need anymore Wisdom teeth?
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Examples of Evolutionary History Not the Same as Current Function… 1. Bone structure in whale flipper or “Tail” of a human fetus
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Examples of Evolutionary History Not the Same as Current Function… 2. Our wisdom teeth Our jaws are smaller than those of our ancestors (e.g. Neanderthal); still have same # of teeth Rationale: with tool use, and cooking, large jaws are no longer necessary, so teeth have had to share maller space. As a result, presence and/or development of wisdom teeth varies. 1.
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This note was uploaded on 04/22/2008 for the course PSYC 2074 taught by Professor Kurthoffman during the Spring '08 term at Virginia Tech.

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Jan24anbhPOST - Tinbergens 4 Levels of Explanation A....

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