Genetic drift operates in

Genetic drift operates in small, isolated population.
Genetic drift is a random fluctuation of gene frequencies that occurs in small populations due to chance events. In small populations, chance events can have a greater impact on the gene pool because there are fewer individuals to produce offspring. Therefore, genetic drift is more likely to occur in small, isolated populations.
(2) Genetic drift it is less likely to occur in large populations because there are more individuals to produce offspring, and chance events are less likely to have a significant impact on the gene pool.
(3) Non-reproductive populations are not subjected to genetic drift because they do not produce offspring and do not contribute to the gene pool.
(4) The rate of genetic drift in slow reproductive populations will be very slow.