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11 Cards in this Set
- Front
- Back
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Name at least two plausible ways for altruistic genes to spread in a population.
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1. Reciprocal altruism
2. Kin selection |
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Reciprocal altruism—
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the idea that animals help those who help them in return. Two individuals who cooperate with each other will prosper; however, reciprocal altruism requires that individuals recognize one another and learn to help only those who return the favors.
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Kin selection--
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selection for a gene that benefits the individual's relatives. For example, a gene could spread it if it caused you to risk you life to protect your children, who share many of your genes, including perhaps the altruism genes. Natural selection can favor altruism toward less close relatives-- cousins, nephews, etc. -- if the benefit to them outweighs the cost to you.
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evolution--
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change over generations in the frequencies of carious genes in a population
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artificial selection--
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the process by which plants and animal breeders choose individuals with a desired trait and make them the parents of the next generation.
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Lamarckian evolution--
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idea that an individual can inherit acquired characteristics to their offspring.
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fitness--
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number of copies of one's genes that endure in later generations.
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evolutionary psychology--
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branch of psychology that deals with how behaviors have evolves especially social behaviors.
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altruistic behavior--
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an action that benefits someone other than the actor
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reciprocal altruism--
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the idea that animals help those who help them in return
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kin selection--
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selection for a gene because it benefits the individual's relatives
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