Why are small populations more affected by genetic drift than larger ones? What will be an ideal ...

Answer to q. 1

In a small population, if one individual produces fewer or more than the average number of offspring or more offspring with one of the alleles, this is proportionally a larger difference than if the same thing happened in a large population. For example, in a stable population of 10, if one homozygote does not contribute alleles to the next generation, that is a 5 percent change in allele frequencies. If, however, the population size was 1000, that would only be a 0.05 percent change in allele frequency.

Answer to q. 2

In a population, both homozygotes are at a disadvantage, keeping the heterozygote unnaturally high and thus maintaining high frequencies of both alleles in the population.

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