SOCI 1101 Lecture Notes - Lecture 1: Samuel Stanhope Smith, Genetic Drift, Population Bottleneck
4 Mar 2017
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*forces change alleles which change genotypes leading to a change in phenotypes: natural selection. *separation of genes: bottleneck effect > not enough variety without mutation, founder effect. Increases genetic drift in forming small villages. * ow of genes into a group: ex. Irish genetic variation study (migration & admixture head measurements) Adaptation: response/reaction got stimuli in the environment, human body response to environmental stress/strain in biological and cultural way. = responses without genetic change: non-adaptive forces : mutation, genetic drifts, gene flow. History that demonstrates adaptation: herodotus > greek historian argues from environmental causes of human variation; studied egyptian skulls. Hippocrates > early medical practitioner & teacher; body is an organism understood through relationship bw environment, behavior, & body; 2 types of body adapted to environment: phthisic (long, thing, & choleric easily angered) and apoplectic (short, squat, & phlegmatic calm) Samuel stanhope smith > environmental causation of racial differences; climate affects nature (lightening & darkening of completion with season.
