Mechanisms of Evolution
Genetic drift is a random process that can cause allele frequencies within a population to change over time. Unlike natural selection, which is based on differential survival and reproduction, genetic drift occurs due to chance events. This is particularly pronounced in small populations where random events can lead to significant changes in allele frequencies from one generation to the next. For example, if a natural disaster randomly eliminates a portion of a population, the remaining individuals may have different allele frequencies than the original group.
Article: "Genetic Drift: The Impact on Evolutionary Dynamics"
Author: Michael Lynch
Source: Annual Review of Ecology, Evolution, and Systematics
Link: https://www.annualreviews.org/doi/10.1146/annurev.ecolsys.36.091704.175603
Case Study: Isle Royale Wolves
Description: Investigates how genetic drift has affected the Isle Royale wolf population, leading to genetic bottlenecks and inbreeding.
Source: "The Effect of Genetic Drift in Small Populations: A Case Study with the Isle Royale Wolves"
Link: https://onlinelibrary.wiley.com/doi/10.1111/j.1523-1739.2005.00297.x
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