Evolution 2 - Evolution 2: Module 1: Reproductive Success =...

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Evolution 2: Module 1: Reproductive Success = Fitness Darwin’s insight proposed that natural selection could be the process that’s responsible for the evolution of the complex adaptations that we creatures are made up of. The only way that selection can produce an evolutionary change is if the offspring inherited that tendency to have relatively large beaks. “Survival of the Fittest” evolutions of traits that help protect you from dying, i.e. larger beaks to eat seeds in time of scarcity. Survival of the fittest is about who can survive better AND who can reproduce better. Traits that help you survive are not going to persist and increase in prevalence as a results of natural selection unless they also help you reproduce. If a genetic mutation helps you live longer, but makes you less interested in sex, then natural selection is going to work against it, tending to eliminate it from the population. Darwinian Fitness: average reproductive success of a type relative to alternate types Observable traits doesn’t mean you can see it, also can be like blood phenotype When we say the fitness of a type, we can refer to either phenotype or genotype, the reproductive success of a particular allele relative to the success of other alleles at the same locus Not only genotypic variation, but also personality variation
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This note was uploaded on 04/17/2009 for the course PSYCHOLOGY 1XX3 taught by Professor Kim during the Spring '09 term at McMaster University.

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Evolution 2 - Evolution 2: Module 1: Reproductive Success =...

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