Lecture 4 - Neutral Evolution: Genetic Drift
recorded by: Yale University
published: April 17, 2010, recorded: January 2009, views: 3749
released under terms of: Creative Commons Attribution No Derivatives (CC-BY-ND)
Report a problem or upload filesIf you have found a problem with this lecture or would like to send us extra material, articles, exercises, etc., please use our ticket system to describe your request and upload the data.
Enter your e-mail into the 'Cc' field, and we will keep you updated with your request's status.
Neutral evolution occurs when genes do not experience natural selection because they have no effect on reproductive success. Neutrality arises when mutations in an organism's genotype cause no change in its phenotype, or when changes in the genotype bring about changes in the phenotype that do not affect reproductive success. Because neutral genes do not change in any particular direction over time and simply "drift," thanks in part to the randomness of meiosis, they can be used as a sort of molecular clock to determine common ancestors or places in the phylogenetic tree of life.
Stearns, Stephen C. and Rolf Hoekstra. Evolution: An Introduction, chapter 3
Link this pageWould you like to put a link to this lecture on your homepage?
Go ahead! Copy the HTML snippet !