PSYCH 2TT3 Chapter Notes - Chapter 2: Common Descent, Termite, Eusociality
23 Dec 2014
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Document Summary
Three requirements for natural selection that include: variation in the trait different varieties of the trait, fitness consequences of the trait different varieties of the trait must affect reproductive success differently, a mode of inheritance a means by which the trait is passed on to the next generation, variation in trait can be caused by environmental factors or genetic factors, genetic variation in populations that be generated by mutation which is a random change in genetic structure, addition and deletion mutations occur when a single nucleotide is either added or deleted from a stretch of dna. Selfish genes genes can sometimes be treated as though they were selfish in that the process of natural selection favours those alleles that increase the expected relative reproductive success of their bearers: adaptations : traits associated with the highest relative fitness in a given environment, its bearers having the highest fitness among a specified set of behaviours in a specified environment.
