BIOL 2400 Lecture Notes - Lecture 17: Jane Goodall, Bipedalism, Ovulation
8 Feb 2018
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Genetic basis to trait: heritable in form of allele, not cultural. Genetic variation in the human pop. (var. in allele freqs: also phenotypic variation. Some offspring have alleles at loci modify their phenotype obtain more food. Selective pressures and evolution of modern humans: fighting off predators, hunting in groups, tool-making make rock into tool, speech hand signals not good enough for defense, adults larynx modified for speech, controlled use of fire. Cultural transmission is also in great apes. Opposable thumbs found in most primates that have thumbs. Older primates: fingernails, dental pattern, 3d vision binocular colour vision. Old world monkeys: 4-chambered stomach, no thumb, social males grow up and leave group. Family hominidae: females cares for infant for 9 years, only have sex in heat. Bonobo: ass is out, everyone knows shes ovulating, eat mostly fruit, some squirrels, bipedal for short distance and carrying things, hips are very different from humans tho.
