Pnas 200510215942 15947 2005 by national academy of

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Unformatted text preview: >ng (inbreeding, outbreeding) – Gene flow between popula>ons – New muta>on (rela>vely unlikely explana>on) – Natural selec>on (Monday) Gene>c Dri: •  Chance changes in allelic frequencies due to random sampling from genera>on to genera>on. •  Dri: happens in all popula>ons, but its effects are more important in small popula>ons. •  2 demographic processes that can cause major evolu>onary change through dri:: –  Founder effects in new popula>ons –  Gene>c boalenecks when popula>on size is reduced Founder effects Founder effects in human popula>ons Pinpoin>ng the source of human range expansion: Human heterozygosity...
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This document was uploaded on 02/19/2014.

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