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Gene flow



The movement and exchange of genes or alleles from one population of species to another


Gene flow is a concept in population genetics to refer to the movement of genes or alleles between interbreeding populations of a particular species. When members of a gene pool mate with members of another gene pool it can alter the allele frequencies (which pertains to the proportion of members in a population carrying a specific variant of a gene). Thus, gene pool can affect the genetic variability within a population. For instance, members of a population of particular species migrating to a new habitat could cause gene flow to occur when they mate with the members of a population already existing in the habitat. Thus, species that are highly mobile would have higher tendency of altering the allele frequency following gene flow. However, there are certain factors that serve as barriers to gene flow. Some of the factors affecting the rate of gene flow include physical barriers, geologic events and geographical barriers. An example of a geographical barrier is the street separating the population of flowering plant species to opposite sides. If the pollen from the plant on the one side is able to fertilize the plant on the other and eventually produce viable offspring, then, this species is able to recombine gene pools. In contrast, if the plant is unable to reach the population of plants of the same species on the other side because of this barrier, then, as a result, there may be little gene flow between the two populations.


  • gene migration

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Could Hardy-Weinberg terminology be more precise?

... concerns not only whether , but also with whom an individaul mates. Gene flow too concerns the 'with whom' question of mating, and it describes another way in which ...

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by wildfunguy
Wed Nov 19, 2014 4:56 pm
Forum: General Discussion
Topic: Could Hardy-Weinberg terminology be more precise?
Replies: 0
Views: 52

Re: Brain size=IQ level theory (Blacks vs Whites & Asians)

... it's obvious your "doctorate" is neither in anthropology nor genetics. You simply don't know what you're talking about. In terms of evolutionary ... thousands of years at most and even then there had been continuous gene flow between different populations of humans. This is certainly ...

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by Seth90210
Sun Feb 16, 2014 9:35 pm
Forum: Human Biology
Topic: Brain size=IQ level theory (Blacks vs Whites & Asians)
Replies: 73
Views: 288958

Out of Africa Vs. Multiregional theory

... Multi-regional theory falls apart as it relies heavily on the idea of gene flow between Asian, European, and African populations. However, DNA evidence has backed up ...

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by sympallopatric
Sat Nov 16, 2013 11:03 am
Forum: Evolution
Topic: Out of Africa Vs. Multiregional theory
Replies: 2
Views: 2477

Brain size=IQ level theory (Blacks vs Whites & Asians)

... If we ever get evidence that—environmental influences equal—African genetics are generally more favorable to the development of intelligence, I would pose the hypothesis that it's due to (a) gene flow throughout a larger population (the population of Africa) allowing for more ...

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by wildfunguy
Sun Oct 27, 2013 9:53 pm
Forum: Human Biology
Topic: Brain size=IQ level theory (Blacks vs Whites & Asians)
Replies: 73
Views: 288958


The gene flow we are aware of, is between homo sapiens and Neaderthals, right? I don't know. I haven't learned about Homo ...

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by wildfunguy
Sat Oct 19, 2013 3:13 pm
Forum: Evolution
Topic: Is complexity inevitable?
Replies: 16
Views: 12870
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