|Genetic drift can be defined as a change in the frequency of allele that is random instead of being driven by selection pressures. According to Mendel law, alleles are randomly assorted into sex cells. When the offsprings reproduce, they can only transmit one of their trait which is inherited from their parents. Genetic drift causes number of changes in a population but only in a few generations, especially if the population is very little. Genetic drift also reduces the genetic variation in a population.
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