Right temporal TMS impairs voice detection

number may not be closely related to the actual number of individuals, but the mathematical theories of genetic drift could still work. But unfortunately, the randomness associated with recombination has different mathematical properties to the random sampling of gametes (Figure 1). With background selection or hitchhiking, if an allele frequency increases in one generation, it is likely to increase again in the next. This is because recombination does not completely mix things up every generation. With genetic drift, what happens in one generation has no connection to what happens in the next. Successive generations of genetic drift mostly cancel each other out, so that over the long term, an allele undergoing genetic drift has much less variation in its success than it would if it were linked to other genes under selection.