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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-1033
DTSTART:20080219T180500Z
DURATION:PT1H0M0S
DTSTAMP:20260423T055201Z
LAST-MODIFIED:19700101T060000Z
LOCATION:4274 Chamberlin Hall
SUMMARY:Acceleration of human evolution: interactions of genes with cu
 lture and geography\, Chaos & Complex Systems Seminar\, John Hawks\, A
 nthropology
DESCRIPTION:Recent surveys of the human genome have shown that thousan
 ds of recent mutations have strong advantages and have increased great
 ly in frequency since their origins during the last 40\,000 years. The
  rate of such changes appears to have increased by a factor of 100 tim
 es over the rate that characterized most of human evolution. Natural s
 election\, as Darwin recognized\, is fundamentally a demographic pheno
 menon: individuals with one allele have a higher intrinsic rate of gro
 wth than those having alternative alleles\, resulting in the replaceme
 nt of such alleles over time. When this process occurs across a popula
 tion spread over geographic space\, a wave of population growth and mi
 gration tends to disperse a selected allele outward from its source. T
 his process is well understood when modeled for a single gene. However
 \, the introduction of many (perhaps thousands) of simultaneously sele
 cted alleles may lead interactions between genes to outweigh the fitne
 ss consequences of individual genes. 
URL:https://www.physics.wisc.edu/events/?id=1033
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