Lecture24 - BioNB 2210: Lecture 24 Oct. 21, 2011 Lecture...

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Unformatted text preview: BioNB 2210: Lecture 24 Oct. 21, 2011 Lecture 24: Eusociality Professor Paul Sherman Learning Objectives 1. To understand how a social system characterized by extreme reproductive self-sacrifice could evolve 2. To learn about the pivotal role the naked mole-rat has played in understanding eusociality A. Defining characteristics of eusociality (an entomological term meaning "true sociality"): 1. Group living 2. Reproductive division of labor (i.e., skew=not all individuals reproduce equally) 3. Overlap of > 2 generations (e.g., parent and offspring) 4. Cooperation in caring for young B. W.D. Hamilton's (1964) insights regarding relatedness asymmetries between female- offspring vs. full sister pairs among haplodiploid insects (ants, bees, and wasps); see also Honeycutt (EAB, p. 286). The 3/4 relatedness of full sisters can also be calculated using Reeves painted allele method. BioNB 2210: Lecture 24 Oct. 21, 2011 C. In support of Hamilton's haplodiploidy hypothesis: 1. All the Hymenoptera (ants, bees, and wasps) are haplodiploid, and only females are workers...
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This note was uploaded on 08/27/2011 for the course BIONB 2210 taught by Professor Seeley during the Fall '10 term at Cornell University (Engineering School).

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Lecture24 - BioNB 2210: Lecture 24 Oct. 21, 2011 Lecture...

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