LIFE SCIENCE

Detailed explanation-1: -Gene flow within a population can increase the genetic variation of the population, whereas gene flow between genetically distant populations can reduce the genetic difference between the populations.

Detailed explanation-2: -The introduction of new alleles through gene flow increases variability within the population and makes possible new combinations of traits. In humans gene flow usually comes about through the actual migration of human populations, either voluntary or forced.

Detailed explanation-3: -Sources of Genetic Variation Gene duplication, mutation, or other processes can produce new genes and alleles and increase genetic variation. New genetic variation can be created within generations in a population, so a population with rapid reproduction rates will probably have high genetic variation.

Detailed explanation-4: -Gene flow tends to homogenize linked populations and lack of gene flow permits interpopulation differentiation. It is of interest to geneticists and managers in that to conserve a population one needs to establish the historical patterns and rates of gene flow.