13+ Biology Gene Flow Example Pictures. Gene flow within a population can increase the genetic variation of the population, whereas gene flow between genetically distant populations can reduce the even nongenetic traits that influence mating and that are correlated with immigrant status can affect gene flow. Any time a gene is introduced into a population where that gene once did not exist, gene flow has occurred.
For example, a storm with strong winds could blow pollen from one population of plants to another.
An example could be a fish being able to cross into another lake during a flood which is normally. This biologywise post explains this phenomenon in detail and provides some examples of gene flow. If the rate of gene flow is high enough, then two populations will have equivalent allele frequencies and therefore can be considered a single effective. For example, a storm with strong winds could blow pollen from one population of plants to another.
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