ANTH 200Lg 2-2-09

ANTH 200Lg - ANTH 200Lg Mechanisms of evolutionary change Natural selection(artificial selection Sexual selection o Intrasexual selection o

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ANTH 200Lg 2/2/09 Mechanisms of evolutionary change: Natural selection (artificial selection) Sexual selection o Intrasexual selection o Intersexual selection Genetic drift o Founder effect o Bottleneck effect Artificial Selection Human manipulation of a species to create offspring with desirable traits Sexual Selection Intra-sexual selection o Male-male competition Males are only limited by the number of females present o Inequality in time and investment between sexes o Males compete for a mate, and whichever male wins is accepted as  the mate for the female Stronger, larger males are selected as mates Comments on the females desire to produce the best  possible offspring for the comparatively long gestation  period and time investment for females Disparity in size between male and female specimen,  dimorphism o In more monogamous pair-bond species, females may compete
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This note was uploaded on 04/22/2009 for the course ANTH 200Lg taught by Professor Yamashita during the Spring '07 term at USC.

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ANTH 200Lg - ANTH 200Lg Mechanisms of evolutionary change Natural selection(artificial selection Sexual selection o Intrasexual selection o

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