How may genetic drift lead to speciation?

How may genetic drift lead to speciation?

•   Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance (sampling error).
• . Lose of gene from or increase in allele frequency of gene in population may alter the selection pressure in a population leading development of new species.
• Although genetic drift happens in populations of all sizes, its effects tend to be stronger in small populations

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