B) an increase in genetic variation to accommodate changes in abiotic conditions.
C) no change in population size but an increase in favorable alleles.
D) a reduction in population size and an increase in genetic variability.
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Home » Biology » The major effect of genetic drift is ... A) a reduction in genetic variability. B) an increase in genetic variation to accommodate changes in abiotic conditions. C) no change in population size but an increase in favorable alleles.