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Chapter 2

ANTH 1210 Chapter 2: Topic 20

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ANTH 1210
Haskel J.Greenfield

c98 diploid = full component of genes (zygote = diploid set) Homo vs. Heterozygous Homozygous Contains a pair of identical alleles for a trait 2 alleles identical recessive trait or dominant trait expressed Heterozygous 2 alleles are different o dominant traits only expressed Genotype vs. Phenotype Genotype = actual genetic composition of organism Phenotype = physical appearance of the organism Monogenic = one location (eye color, albinism) Polygenic = more than one location (height, weight) Mutation = ultimate source of genetic changes o Any random assortment of genes Populations Fundamental units of heredity DNA molecules Chromosomes Genes Genes Units upon which natural selection acts Population Groups of organisms Each member more likely to mate with another member (rather than outsider) similar to society PROXIMITY Evolution acts through genes of individuals upon groups Evolutionary forces Do not act upon genesindividuals Act on populations through o Genes, gene combinations, individuals Biological Population
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