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Gene flow differs from genetic drift because it is the transfer of alleles or gametes from one population to another. It happens when a population migrates or becomes geographically isolated. This is different from the genetic drift seen with the founder effect where the new group is formed in an area that does not have an existing population.
The main difference between genetic drift and gene flow is that genetic drift is a random process that can lead to the loss or fixation of alleles, while gene flow is a directional process that introduces new alleles into a population.
Gene flow allows the combination of gene pools of two populations. However, gene flow allows the origination of new species by the gene transfer. Since genetic drift is a natural process, it is also called the random drift. Genetic drift occurs through founder effect and bottlenecks.
While gene flow increases genetic diversity, promotes gene exchange, and counteracts the effects of genetic drift, genetic drift leads to the loss or fixation of alleles, reduces genetic diversity, and can contribute to population divergence.
This balance between gene flow and selection is a critical factor in determining the evolutionary outcomes in hybrid zones. Explore the differences between genetic flow and drift, their mechanisms, and their impact on population genetics.
Genetic drift affects the genetic makeup of the population, but unlike natural selection, through an entirely random process. So although genetic drift is a mechanism of evolution, it doesn’t work to produce adaptations .
Natural selection, genetic drift, and gene flow are the mechanisms that cause changes in allele frequencies over time. When one or more of these forces are acting in a population,...
This BiologyWise post tries to make an in-depth comparison of genetic drift vs. gene flow vs. natural selection - three of the four main mechanisms that have played a fundamental role in driving evolution forward.
Gene flow is the movement of genes from one population to another due to migration, whereas genetic drift is a change in the frequency of a gene variant in a population due to chance events. Gene flow is a conscious movement of genes, while genetic drift is a random process.
Gene flow and genetic drift are ways of changing genetic variation within a population with time. There are similarities and differences between the two. Gene flow, or migration, refers to the movement of genes or alleles between two different populations of the same species. It occurs when individuals from one population migrate and interbreed ...