ANTHRO 102 Lecture Notes - Lecture 24: Negroid, Hypodescent, Melanin
Document Summary
Natural selection directs change in a particular way. *** natural selection works on phenotype, not genotype. They die from 10 to 20 days. Sickle cell trait was protected against malaria (an individual is more or less fit in the environment) Descent: social identity on the basis of ancestry. Rule of hypodescent: a child potentially a member of two groups will be assigned to the minority group. If a baby is half black and half white, he will say he is black. When you check that little box on the papers of which race you are. Siblings are all able to be a different race. Skin color (provides a clear example for adaption and natural selection) Sunlight -> vitamin d -> absorb calcium. Two rules that pertain to the relationship of body size and body shape with the climates. Short term adaptations: high altitude appendages are adaptive in cold climates. Bergmann"s rule: body size is larger in colder climates.
