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Dictionary » G » Genetic drift

Genetic drift

Definition

noun

The process of change in the genetic composition of a population due to chance or random events rather than by natural selection, resulting in changes in allele frequencies over time.


Supplement

The effect of genetic drift in large populations is usually negligible whereas in small populations, it predominates. In a small population, genetic drift results in some alleles become more common while others become less common over time.


Compare: natural selection


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Re: Natural selection is proven wrong

... that created a new species. And the genome must first be already drifting in that direction or else such morphological change is impossible. ... image as being human and sexy. What produces this may be that it is epigenetically possible to drift in that direction, or already are. How long ...

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by GaryGaulin
Tue Sep 01, 2009 3:00 am
 
Forum: Evolution
Topic: Natural selection is proven wrong
Replies: 177
Views: 16275

Re:

... not explain where the variation it acts on comes from. This is where genetics comes in. One source is assortive mating, and another is mutation. ... Selection is one mechanism of evolution, and others (such as genetic drift) could also be part of that mechanism for evolutionary change from ...

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by robsabba
Fri Aug 28, 2009 5:29 pm
 
Forum: Evolution
Topic: Natural selection is proven wrong
Replies: 177
Views: 16275

Natural selection is proven wrong

... Or a population that became isolated from another can experience genetic drift that forces them forever apart. Speciation is a process where a population so much changes ...

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by gamila
Thu Aug 27, 2009 11:10 am
 
Forum: Evolution
Topic: Natural selection is proven wrong
Replies: 177
Views: 16275

Re:

... Or a population that became isolated from another can experience genetic drift that forces them forever apart. In some cases speciation happens very slowly by taking ...

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by GaryGaulin
Thu Aug 27, 2009 9:13 am
 
Forum: Evolution
Topic: Natural selection is proven wrong
Replies: 177
Views: 16275

Re: Bird-Dinosaur News

... exceptions). So in the evolution model because there is constant slow genetic drift--it's just a case of defining when they became birds. In light of the news though, they ...

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by AFJ
Sun Jun 14, 2009 3:21 pm
 
Forum: Evolution
Topic: Bird-Dinosaur News
Replies: 44
Views: 1044
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