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10 Cards in this Set
- Front
- Back
People who share the same haplogroup (or haplotype) do so because they share specific combinations of ____________.
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Genetic Markers
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Single Nucleotide Polymorphisms (SNPs):
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Places in DNA sequences at which point mutations have caused one-base differences
example: CCTGAA vs CCCGAA |
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2. Microsatellites:
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short (2-5 base) sequences of non-coding DNA that repeat a variable number of times
ex: CACACA vs CACACACA |
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The Biological Race Concept:
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Human beings can be usefully classified into a limited number of overall biological types, based on morphological (=phenotypic) traits and/or genetic evidence.
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A brief history of the race concept:
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- a classification of human variation
- early records don’t use the idea - origins during Renaissance? - origin of concepts in the 18th century? |
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C. Loring Brace-
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physical anthropologist
20th century -- American Before the mid-14th century, people walked or rode horseback from place to place….visible physical variation was gradual. As the Renaissance began, ocean-going vessels traveled long distances and explorers began to see people in distinct groups slow gradations were not so visible physical differences became more obvious |
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Johann Blumenbach
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Late 18th century German anatomist
Biological taxonomy of human races, using: - skin color - features of the human skull - facial projection - length and width of skull Asserted there were 5 races of people, - static and immutable |
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Franz Boas
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- founder of American Anthropology
- challenged Blumenbach’s ideas - studied immigrant families in the US - calculated cephalic index : parents & children’s head lengths - differed to a small degree: not static - race is NOT a valid concept |
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Evidence available to test the hypothesis that there are races in modern humans:
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Genetic evidence
Morphological evidence - Craniometrics - Patterns of skin reflectance - Patterns of disease |
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Population
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For our purposes, a “breeding population”
- a cluster of individuals of the same species who share a common geographical area, - who find their mates more often in their own cluster than in others. |