Migration and exit of a population are important factors that can lead to the introduction or removal of certain alleles from the gene pool. When individuals migrate or exit a population, they take their genotypes with them, potentially changing the genetic makeup of both the source and destination populations. The introduction or removal of alleles due to migration or exit can have a significant impact on the genetic diversity and evolutionary trajectory of a population. For example, the loss of genetic diversity due to the departure of a large number of individuals can increase the risk of inbreeding and decrease the capacity of a population to adapt to changing environmental conditions. On the other hand, the introduction of new alleles through migration can increase genetic diversity and potentially improve the adaptive capacity of a population. In short, migration and exit can have important implications for the genetic makeup and evolutionary potential of populations.
