PSYCH 1XX3 Study Guide - Midterm Guide: Inclusive Fitness, Unit, Twin
16 Feb 2017
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Organism evolve to maximize fitness and reproductive success. Altruism exists throughout the animal kingdom: helping others at the cost of themselves, ex. Bees spend lives in the service of the colony. Ns fa(cid:448)ou(cid:396)s the (cid:862)selfish ga(cid:373)e(cid:863: favours genes that best serve their own interest. Increasing fitness of others can increase your own fitness. Adaptations must increase success of the gene; not necessarily the group. Foraging in groups increase personal success of obtaining food: ex. Selection must be good for the gene, regardless of how it acts on the group. Altruism: behaviour in which the actor incurs a cost to provide a benefit to a recipient, not altruism foraging/vigilance in groups not altruism bc actor gains directly from the behaviour. Altruists decrease their own fitness when helping others. Altruism cannot thrive if it cannot be passed down genetically: lennings live in the far north, myth about suicidal population control, one gene for altruism and one for suicide.
