Zoology - Lecture 25 - Course Evaluation ZOO 1114 section...

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Course Evaluation ZOO 1114 section 900 Instructor’s Name: Melody Brooks ZAP number: 146904 Cooperation with no benefit and BIG cost ALTRUISM • Maximize reproductive output Cooperation with no benefit and BIG cost ALTRUISM W.D. Hamilton (1964) Inclusiveness Fitness 1. Direct fitness E.g. passing genes directly to offspring 2. Indirect fitness – must recognize relatives E.g. kin selection Assumes: individuals are able to recognize relatives Predictions: altruistic behavior is directly proportional to the degree of relatedness Proportion shared alleles/degree of relatedness Potential benefit Benefits must outway the costs: rb>c e.g. sacrificing one child (c=1) is offset if you aid a sibling (r=.5) have 3 additional offspring Extreme Altruism • Eg. Eusocial (“true” social) insects Caste System: • Queens, workers, drones **only the queens reproduce** ** drones are haploid** 1.How are true social groups defined? 2. Why do true social groups form?
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This note was uploaded on 04/22/2008 for the course ZOO 1114 taught by Professor Melodybrooks during the Spring '08 term at The University of Oklahoma.

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Zoology - Lecture 25 - Course Evaluation ZOO 1114 section...

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