ANTHRBIO 201 Study Guide - Midterm Guide: Cladistics, Food Choice, Macroevolution
1 Sep 2016
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Review for midterm #1: natural selection and other forces of evolution. Define and explain the effects of each of the four forces of evolution: Mutation: ultimate source of genetic variability, physical base of mutations: point mutations, chromosomal deletions, mutation rates. Measured in events per base pairs per generation: mutations cause a slow, steady loss of existing alleles. Migration: the movement of genes between populations, migration is predicated on: Ability of individuals of the same species to mate: migration homogenizes and maintains similarities across populations, can produce large changes in gene frequencies over time, effect of a single migrant can be substantial. Natural selection: differential reproduction of individuals based on the heritable differences between them, depends on: with thought experiment example. Deteriorating ecological conditions leads to a reduction in the food supply for a group of monkeys. Some females produce 10 kids; others produce 2. Variation in reproduction is due to heritable difference.
