ANTH 1102 Study Guide - Quiz Guide: Hominini, Aquatic Adaptation, Microevolution
9 Jan 2017
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Evolution- changes over time: macroevolution- changes of species over time. Speciation- new species: microevolution- changes in gene or allele frequencies over time in a population. Can occur in a generation (15-20 years for humans0. The concept of frequency: phenotype- physical trait that affects fertility or mortality, e(cid:454)a(cid:373)ple: e(cid:374)dle(cid:396)"s guppies. Colorful males- attract most mates and predators. Bland males- attract least mates and predators: example: elephants and (cid:862)tusklessness(cid:863) Poaching in tanzania caused (cid:862)tusklessness(cid:863) gene to prevail because poachers wanted tusk from elephants: example: mosquitoes carrying malaria. Hit and rest mosquitoes (resting to digest blood)- allele started dying out because people put chemicals on the walls to kill them. Hit and run mosquitoes (flying away before resting to digest blood)- this allele became prevalent mosquitoes because hit and rest mosquitoes started dying out: staphylococcal bacteria. Causes wounds to expand and not heal. 1997: 5% effective, bacteria built immunity to the antibiotic. Ciprofloxacin- kills a lot of natural bacteria.
