LIFESCI 3C03 Chapter Notes - Chapter 11: Inclusive Fitness, Forego, Natural Selection
23 Mar 2017
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Document Summary
Social behaviour: a behaviour that has consequence for both the individual that performs the behaviour (the actor) and another individual (the recipient). Classification of social behaviours: mutually beneficial: beneficial to both actor and recipient, altruistic: beneficial to recipient, costly to actor, selfish: beneficial to actor, costly to recipient, spiteful: costly to both actor and recipient. Natural selection favours individuals who maximize their genetic contribution to the next generation in the form of parental care. Diploid species: offspring at 50% related to each parent. Gene proliferation can occur through care for any kin, including children, siblings, grandparents, etc. Coefficient of relatedness: the likelihood that individuals share a gene that is identical by descent r = 0. 5l, where l = number of generation links. If a pedigree of relatedness between individuals is not known, relatedness can be measured by the extent to which individuals share common alleles in molecular markers (e. g. microsatellites) Direct fitness: the component of fitness gained from producing offspring.
