2.3 Evolution and Genetics.docx

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Department
Anthropology
Course
ANTHRO 100
Professor
Rebecca Bartusewhich
Semester
Spring

Description
Jayson Latady  Anthro 100 Evolution and Genetics Pre­Darwinian Theories • Earliest references are from Greeks; even Darwin’s grandfather believed in the  common ancestry of all organisms  • Organs change as the need arises • Used giraffes as his explanation (Lamarck) • Suggested that those acquired traits were then passed along to offspring Charles Darwin and Alfred Russell Wallace • Both were working on the same ideas of evolution Natural Selection • Genetic change that results from differential reproductive success • Relies on fitness • Favorable traits give an organism an adaptive advantage • Variation MUST exist • Environment is a determining factor Grogor Mendel • Principle of Segregation: Chromosomes segregate • Principle of independent Assortment: Chromosomes sort individually Microevolution: Gene Flow  • In population genetics, gene flow is the transfer of alleles or genes from one  population to another. Migration into or out of a population may be responsible  for a marked ch
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