ANT 102 Lecture Notes - Lecture 7: Racial Democracy, Ethnic Group, Stolen Generations
26 Feb 2017
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Document Summary
Phenotype: the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment. Human phenotypes vary within and among populations. External: height/body; shape/mass, hair/eye/skin colors, facial features, behavioral and cultural adaptations. Internal: blood type and antigens, ability to digest, susceptibility to disease, energy metabolism. What is the source of variation: forces of microevolution. Decreases diversity within geographically (or culturally) isolated populations (examples: founder effect and bottleneck event: natural selection. Must have existing variation in a population. Acts on fitness (differential survival and reproduction: mutation (individual level) Random changes in the dna molecules of which genes and chromosomes are built. The ability to break down lactose because of a mutation in the lactase gene (lct) Hbs hemoglobin is an adaptation to infections disease. Examples: lavinia warren being 2"8 and wadlow being 8"11 . Biological plasticity: changes in biology due to environmental changes or stressors (nutrition, parasites, infections, prenatal environment, etc. )
