Lecture 6 - The Origin and Maintenance of Genetic Variation

author: Stephen C. Stearns, Department of Ecology and Evolutionary Biology, Yale University
recorded by: Yale University
published: April 17, 2010,   recorded: January 2009,   views: 3046
released under terms of: Creative Commons Attribution No Derivatives (CC-BY-ND)
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Mutations are the origin of genetic diversity. Mutations introduce new traits, while selection eliminates most of the reproductively unsuccessful traits. Sexual recombination of alleles can also account for much of the genetic diversity in sexual species. In some instances, population size can affect diversity and rates of evolution and fixation, but in other cases population size does not matter.

Reading assignment:

Stearns, Stephen C. and Rolf Hoekstra. Evolution: An Introduction, chapter 5

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