Pollen grains are transported from one plant to another for pollination by birds, wind, insects like bees, etc. The offspring will carry the antibodies of malaria inherited from his/her African parent. For instance, if green parrots are introduced to a population of red jungle parrots, it will lead to more variations of colour in the jungle parrot’s gene pool.Īnother gene flow example can be when individuals from Africa where malaria is rampant, mate with Europeans. Most animals and human beings, on reaching maturity, leave their herd or family to mate with members of other groups. These are discussed in detail below -Īccording to gene flow definition, when individuals from one population breed with members of another population, they introduce new allele traits which change the genetic structure of the second group. Several factors that are responsible for the flow of genes in and out of a population. However, if two groups constantly interbreed within themselves, they will also start sharing a common gene pool which reduces genetic variations. Generally, if the number of migrants is large and there is a considerable difference in gene frequency between the migrants and residents, then the former will have more effect in changing the genetic composition of the latter.

It is also called migration because of the constant flow of individuals in or out of a population which affects the composition of the gene pool of a receiving population. It is a phenomenon where new genetic traits are introduced in a population due to interbreeding with another group. Several sources play a significant role to give rise to variations of genes in a group. Gene variations refer to the differences of genetic makeup in organisms of a population. Plants can also do this kind of gene transfer if sometimes if you have hybridization and this can happen in another kind of creatures besides simply plants but hybridization when you have two species cross sometimes you windup adding some genes from a new spec- from the old species unto the new species and so gene flow or genetic transfer that's when it's within the same species through migration gene transfer is between species.We know that genetic variation is an essential component of the evolutionary process as it facilitates natural selection. Viruses are another way that you can have gene transfer because viruses can sometimes cross from one creature to the next and there is a lot viruses like HIV for example a lot of viruses can insert their DNA into the host cells DNA and they may actually be able to transfer gene from one host cell from say species A into the host cell of species B.

Some of the ways that this can happen is bacteria are notorious for this, they can take genes from other bacteria when some bacteria die other bacteria can take in their genes it's freakishly weird. Now this is not that common for you to know about but actually happens a lot in nature. Now sometimes kids get this kind of confused with the idea that's a little bit weird and that's called gene transfer and that's not when members of a different population but still the same species leave or join you, it's when genes are, alleles are transferred from one species to another. Immigration again it's coming in people bring in new alleles or they perhaps a larger group of people have a lot of a particular allele and they can change the overall balance of alleles within the gene pool of the population they just joined versus immigration when emigration sorry when you take a group subset of your population and remove them they take away their genetic nature perhaps lowering or altering their frequency of the region population. Immigration new people come in or new organisms come in bring with them new stuff or by emigration exiting you have some people leave and that can cause some changes in the relative frequencies or percentages of genes within that population so genetic flow again is the transfer of alleles from one population to another through migration. You may have heard of genetic drift that's when you have within a population you have random changes or gene flow is when you have your population of organisms and then either through migration. In evolution one of the things that can cause genetic change within a population is a concept called gene flow.

Gene flow definition