What is the term for the movement of genes from one population's gene pool to another due to reproduction?

The term for the movement of genes from one population's gene pool to another due to reproduction is gene flow. Gene flow occurs when individuals from one population migrate to another, leading to the exchange of genetic material. This process can increase genetic diversity within a population, helping to maintain or enhance its viability and adaptability in changing environments.

In contrast, gene drift refers to random changes in allele frequencies within a population, typically occurring in small populations and not directly related to reproduction between individuals. Gene migration may sound similar, but it is not the most precise term commonly used in genetics; it can often imply the physical movement of organisms rather than the genetic exchange through reproduction. Crossing over is a process that occurs during meiosis, where portions of DNA are exchanged between homologous chromosomes, creating new allele combinations within an individual but not involving gene movement between populations.