AP BIOLOGY

Detailed explanation-1: -Gene flow is the process by which certain alleles (genes) move from one population to another geographically separated population. In plant pathology, gene flow is very important because it deals with the movement of virulent mutant alleles among different field populations.

Detailed explanation-2: -Gene flow is the movement of genes into or out of a population. Such movement may be due to migration of individual organisms that reproduce in their new populations, or to the movement of gametes (e.g., as a consequence of pollen transfer among plants).

Detailed explanation-3: -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-4: -An important evolutionary force is gene flow: the flow of alleles in and out of a population due to the migration of individuals or gametes.

Detailed explanation-5: -Migrants change the distribution of genetic diversity among populations, by modifying allele frequencies (the proportion of members carrying a particular variant of a gene). High rates of gene flow can reduce the genetic differentiation between the two groups, increasing homogeneity.