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Chapter 2

ANTH 1210 Chapter 2: Topic 21
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Department
Anthropology
Course
ANTH 1210
Professor
Haskel J.Greenfield
Semester
Fall

Description
o78P Species Largest Mendelian population Can be subdivided into smaller biological populations Individuals able to reproduce and produce fertile offspring Demes Smallest population Groups of genetically similar individuals o Living in same geographic area o Interbreeding to a large extent only with other members of the deme Phenotypic Variations within Populations 2 sources variation in genotypes different environmental pressures differently affects phenotype natural selection selects against homozygotes Phenotypic Variation Continuous variation Smooth gradient 2 extremes Normal bell shaped curve o Height, weight, skin color Discontinuous Variation Population divided into discrete groupsobvious groups Without intermediates A, B, O, AB No variation Sex Polygenic vs. Monogenic Continuous variation = polygenic traits Discontinuous = monogenic traits Evolution at simplest
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