Question

Select the appropriate effect of genetic drift on variation between populations: maintained/increased orreduced

Select the appropriate effect of frequency-dependent selection on variation: maintained/increased orreduced

Select the appropriate effect of stabilizing selection on variation: maintained/increased orreduced

Answer 1

• Genetic drift reduces the genetic variation: genetic Drift reduces the heterozygosity and increase homozygosity. During genetic drift some allele get eliminated from the population and some get fixed as a result the gene pool decreases.it is more prominent in small population.
• Frequency dependent selection maintained genetic variation: frequency dependent selection is of two type positive and negative. Positive selection favor the most common phenotype whereas negative selection favour the rare phenotype and hence result in maintaining the genetic variation.
• Stabilizing selection decreases Genetic variation: it favour the phenotype which has the intermediate trait . Extreme phenotype get eliminated as a result gene pool get reduced.