Dictionary » G » Gene pool

Gene pool

Definition

noun, plural: gene pools

(population genetics)

The total number of genes of every individual in an interbreeding population.


Supplement

A large gene pool indicates high genetic diversity, increased chances of biological fitness, and survival. A small gene pool indicates low genetic diversity, reduced chances of acquiring biological fitness, and increased possibility of extinction.

Gene pool increases when mutation occurs and survives. Gene pool decreases when the population size is significantly reduced (e.g. famine, genetic disease, etc.). Some of the consequences when gene pool is small are low fertility, and increased probability of acquiring genetic diseases and deformities.

Gene pool gives an idea of the number of genes, the variety of genes and the type of genes existing in a population. It can be used to help determine gene frequencies or the ratio between different types of genes in a population.


Word origin: gene: from G genea, generation, race + pool: Middle English, from Old English pōl.
Related phrases: long-term gene pool.

See also: gene frequency, genetic diversity, genetic isolation.


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Re: Why do Africans have large noses and lips?

... answer to this specific question, but we do know some things about how genes are linked on DNA. Sometimes a trait that is helpful for survival is ... on the DNA strand. So when natural selection keeps trait A in the gene pool as advantageous, trait B is also preserved. Trait B may confer no advantage, ...

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by anneland
Sun Mar 09, 2014 6:54 pm
 
Forum: Human Biology
Topic: Why do Africans have large noses and lips?
Replies: 31
Views: 213239

Beneficial mutations vs harmful

... environment, so they gradually wane or disappear altogether from the gene pool due to organisms without such mutations superseding them. Thus harmful mutations rarely ...

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by biohazard
Tue Oct 08, 2013 12:39 pm
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 7835

Re: Re:

... - fact. However, we talking about the SAME (already present in the gene pool) DNA material. "This extraneous DNA, if further modified can become an entirely new ...

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by thoffnagle
Mon Jul 01, 2013 4:37 pm
 
Forum: Evolution
Topic: Is evolution as simple as we think?
Replies: 38
Views: 22297

Re: Re:

... - fact. However, we talking about the SAME (already present in the gene pool) DNA material. What you say above does not make any sense. It is irrelevant whether the ...

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by biohazard
Mon Jul 01, 2013 6:46 am
 
Forum: Evolution
Topic: Is evolution as simple as we think?
Replies: 38
Views: 22297

Re: Re:

That does not mean that new genes aren't/can't be created through mutations and mistakes during mitosis/meiosis. ... not entirely correct that the "genes/alleles were already there in the gene pool." They may not have been. You are right and wrong at the same time. Translocation ...

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by Cat
Sun Jun 30, 2013 3:42 pm
 
Forum: Evolution
Topic: Is evolution as simple as we think?
Replies: 38
Views: 22297
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