VUBio110BSp'08-DarwinNatSelFitness 10-POST

VUBio110BSp'08-DarwinNatSelFitness 10-POST - Lava flow ~1.7...

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Voyage of the HMS Beagle
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Descent with Modification? Glyptodont – fossil ancestor to armadillo
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Adaptation of Galapagos Tortoises varied adaptations to varied environment
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Populations have the potential to increase exponentially Populations are fairly constant in size Natural resources are limited Variation within a species and variation is inherited There is struggle for existence. Only some individuals survive Those with favorable variation are more likely to survive / reproduce Accumulation of variation (change) over time is evolution observations deductions Darwin’s Observations and Deductions
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How Natural Selection Works Variation in traits (heritable variation) Overproduction of offspring Struggle for existence Resources are limited Malthus on human populations Differential survival AND reproduction “Survival of the fittest”?
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Modes of natural selection (note: selection acts on phenotype)
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Unformatted text preview: Lava flow ~1.7 million yrs. old Hoekstra, H.E. and M.W. Nachman. 2005. Coat-color variation in rock pocket mice ( Chaetodipus intermedius ): from phenotype to genotype. In Mammalian Diversification: from Chromosomes to Phylogeography, UC Press, Zoology. Vol. 133, pp.79- 99 From Lecture 1: http://www.hhmi.org/biointeractive/evolution/lectures.html Directional Selection Stabilizing Selection Disruptive Selection http://www.brooklyn.cuny.edu/bc/ahp/LAD/C21/C21_Disruptive.html Disruptive Selection http://www.globalchange.umich.edu/globalchange1/current/labs/Lab7/Moth.htm Figure 3.c.3 Composition of various populations of the peppered moth in the British Isles http://www.smccd.net/accounts/bucher/melanism.htm Survival of the Fittest fitness of and selection on a phenotype Fitness and selection is a function of environment...
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This note was uploaded on 04/07/2008 for the course BSCI 110B taught by Professor Due during the Spring '08 term at Vanderbilt.

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VUBio110BSp'08-DarwinNatSelFitness 10-POST - Lava flow ~1.7...

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