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Anthropology 200Thursday

Anthropology 200Thursday - Anthropology 200 Chapter 14...

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Anthropology 200 Thursday, April 10, 2008 Chapter 14- Microevolution in Modern Humans Human Populations - Population- a group of interbreeding individuals o Displays degree of genetic relatedness o Difficult to define o Shares a common gene pool - Gene Pool - total of genes withing a reproductive community o Gene distribution affected by mate choice o Mate choice determined by: geographical , ecological , economic , social, and temporal factors has been constricted by time, social factors (class (caste, rank) systems, “outward beauty”- “out of my league”, - Breeding Isolates - populations clearly defined by geographical or social barriers o Important for micro-evolutionary studies - Endogamy - mating with individuals within the group - Exogamy -mating outside the group o Accelerated by modern transportation - Human population continuum: overlaps through space o Exp.: religious group, city, state, nation, species o When two different populations breed together enough, you get a speciation Population Genetics - Hardy-Weinberg - theory of genetic equilibrium o Pivotal theory in population genetics o Predicts the distribution of alleles in populations under ideal conditions - Ideal Conditions o 1. The population is large o 2. No mutation o 3. No gene flow
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