ANTH 101 Chapter Notes - Chapter 5: Vasodilation, Vasoconstriction, Deciduous Teeth
Document Summary
Chapter 5: biology in the present, living people. Debunking the race concept: franz boas shows that human biology is not static. Franz boas challenges taxonomic approach to human variation: early 1900s, he and his researchers studied 18,000 immigrant families, calculating the cephalic index (ratio of head width to head length), finding changes between generations. 1970s, lewontin finds that races account for only 5-10% of genetic diversity: most variation occurs across human populations regardless of racial makeup, race not supported by genotypes either. The growth cycle: conception through adulthood: the human growth cycle, from embryo to fetus to child to adult, consists of three stages, 1. Prenatal stage = includes three periods, or trimesters, of pregnancy and ends with birth: 2. Adult stage = includes the reproductive period (from about age 20 to the end of the childbearing years) and senescence (period of time after the childbearing years)
