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Genetic drift is a mechanism of evolution that causes random changes in allele frequencies in populations, leading to reduced genetic variation.
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Learn about the Hardy-Weinberg mechanisms of evolution and how they affect allele and genotype frequencies in populations.
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We learned something called genetic drift. It's a process in which random events can make certain genes just drift away and then automatically, the genes that survive that random event will get more passed on and ends up becoming majority in that population.
Get an overview of variations on Mendel's laws, including multiple alleles, incomplete dominance, co-dominance, pleiotropy, lethal alleles, sex linkage, genetic interactions, polygenic traits, and environmental effects.
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Learn how to build a phylogenetic tree by hypothesizing evolutionary relationships based on observable traits and genetic evidence.
According to the Genetic drift chapter, "The bottleneck effect is an extreme example of genetic drift that happens when the size of a population is severely reduced. Events like natural disasters (earthquakes, floods, fires) can decimate a population, killing most indviduals and leaving behind a small, random assortment of survivors. ........
Test your knowledge of evolution and natural selection!