Dictionary » G » Genetic variation

Genetic variation

Definition

noun

1. Variations of genomes between members of species, or between groups of species thriving in different parts of the world as a result of genetic mutation.

2. Genetic diversity in a population or species as a result of new gene combinations (e.g. crossing over of chromosomes), genetic mutations, genetic drift, etc.

3. Important in maintaining biodiversity among species.


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Re:

... look at how Darwin defined Natural Selection (paraphrasing) 1. There is variation among indiviuals in a popualtion. 2. That variation is inheritable ... 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. ...

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by robsabba
Fri Aug 28, 2009 5:29 pm
 
Forum: Evolution
Topic: Natural selection is proven wrong
Replies: 177
Views: 16273

meiosis in the production of gametes ...

... one explain me the role of meiosis in the production of gametes and genetic variation through recombination of alleles and genes including independent assortment and crossing ...

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by hephzi
Tue Aug 25, 2009 10:46 am
 
Forum: Cell Biology
Topic: meiosis in the production of gametes ...
Replies: 2
Views: 62

Question on Predators/ NS

Random mutations give rise to new genetic material, this along with natural selection brings about a variation from the original 'stable' genome. Example with the carp - an 'original' fish is competing with ...

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by futurezoologist
Sun Aug 09, 2009 12:14 pm
 
Forum: Evolution
Topic: Question on Predators/ NS
Replies: 6
Views: 157

Re: The Colin Leslie Dean species paradox

... or some such ridiculousness. Instead I examine a linear progression of genetic change in organisms that have some or all characteristics of what ... classified as species - but remove that stable state, introduce genetic variation, change selective pressures and the lines between species will ...

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by AstusAleator
Sat Jul 18, 2009 12:46 am
 
Forum: Evolution
Topic: The Colin Leslie Dean species paradox
Replies: 120
Views: 2138

Re: The Colin Leslie Dean species paradox

... not by population of macro-organisms, but by the combined workings of genetic variation and cumulative selection. In other words, probability is key. Every variation of ...

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by Jasper903
Thu Jul 16, 2009 4:35 pm
 
Forum: Evolution
Topic: The Colin Leslie Dean species paradox
Replies: 120
Views: 2138
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