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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 ____________.
Genetic Markers
Single Nucleotide Polymorphisms (SNPs):
Places in DNA sequences at which point mutations have caused one-base differences
example: CCTGAA vs CCCGAA
2. Microsatellites:
short (2-5 base) sequences of non-coding DNA that repeat a variable number of times
ex: CACACA vs CACACACA
The Biological Race Concept:
Human beings can be usefully classified into a limited number of overall biological types, based on morphological (=phenotypic) traits and/or genetic evidence.
A brief history of the race concept:
- a classification of human variation
- early records don’t use the idea
- origins during Renaissance?
- origin of concepts in the 18th century?
C. Loring Brace-
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
Johann Blumenbach
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
Franz Boas
- 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
Evidence available to test the hypothesis that there are races in modern humans:
Genetic evidence
Morphological evidence
- Craniometrics
- Patterns of skin reflectance
- Patterns of disease
Population
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.