Final answer:
Gene flow is the transfer of genetic material from one population to another, leading to increased genetic diversity and possibly affecting evolutionary trajectories.
Step-by-step explanation:
The influx of genes from other populations is known as gene flow. Gene flow is an evolutionary force that can introduce new genetic variation into a population due to the migration of individuals or their gametes (like pollen in plants). When individuals from one population migrate to another, they can introduce alleles (variations of genes) that are common in their source population to the new population where those alleles might be rare. Examples of gene flow include seeds being dispersed by wind or animals to new locations or animals like birds carrying pollen from one population to another. This process contributes to the genetic diversity of populations and can be an essential factor in their adaptation and evolution.