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Explore the fundamental concepts of genetic drift through detailed examples and key characteristics in this 35-minute lecture. Learn about fixation probability and how random sampling affects allele frequencies in populations. Examine real-world examples of genetic drift in action, including the founder effect where small groups establish new populations with limited genetic diversity, and the bottleneck effect where population size dramatically decreases due to environmental pressures or catastrophic events. Understand how these random evolutionary forces shape genetic variation in populations over time, particularly in small populations where drift effects are most pronounced.
