Genetic drift is best described as the redistribution of the frequency of gene occurrence in a population.
Gene variations may totally vanish due to genetic drift, which would limit genetic diversity. Additionally, it has the potential to make previously uncommon alleles far more common and even fixed.
The impact of genetic drift is more pronounced and less pronounced depending on how many copies of an allele are present. The relative relevance of neutral processes, such as genetic drift, vs natural selection was the subject of heated discussions in the middle of the 20th century.
Ronald Fisher, who used Mendelian genetics to explain natural selection, believed that genetic drift only had a minimal influence on evolution. This idea predominated for a number of years.
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