The term for the spread of characteristics from one population to another is known as gene flow. Gene flow occurs when individuals or their gametes move between populations, resulting in the exchange of genetic material. This process plays a critical role in evolution, as it can introduce new alleles into a population, enhancing genetic diversity and adaptive potential. Gene flow can counteract the effects of genetic drift and selection, maintaining interconnectedness among populations. Understanding gene flow is essential for conservation and managing species that face habitat fragmentation or human-induced changes.