Dictionary » V » Variation

Variation

Definition

noun, plural: variations

(1) A difference or deviation (e.g. in structure, form, function) from the recognized norm or standard.

(2) A modification in structure, form or function in an organism, deviating from other organisms of the same species or group.

(3) Mutant; an organism possessing characteristic(s) as a result of mutation.


Supplement

In genetics, variation refers to an individual that possesses characteristics different from the others of the same kind.

Variation can be measured at the individual level, i.e. differences between individual people, or at the population level, i.e. differences between populations living in different regions.


Word origin: Latin variātiōn- (s. of variātiō), equiv. to variāt(us).


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Raw Materials: Heritable variation among individuals

Please explain this sentence, a single gene codes for a single protein.

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by selena98
Mon Mar 16, 2015 11:00 am
 
Forum: Genetics
Topic: Raw Materials: Heritable variation among individuals
Replies: 0
Views: 71

Re: Which has a greater impact of evolution, mutations or genet

Am I correct in stating that, within a population of sexually reproducing organisms, genetic recombination produces more genetic variation compared to mutations and thus is a more important source on of variability on which natural selection operates, whereas in populations of organisms ...

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by Cat
Fri Oct 31, 2014 2:26 am
 
Forum: Evolution
Topic: Which has a greater impact of evolution, mutations or genet
Replies: 1
Views: 1090

Which has a greater impact of evolution, mutations or genet

... There are mixed answers to this question from different sources. Campbell's biology textbook states that mutations are rare and that large genetic variations in a population of organisms that reproduce sexually is due to genetic recombination. However, this book does not tell me which source of ...

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by alpha78
Sun Oct 19, 2014 2:57 pm
 
Forum: Evolution
Topic: Which has a greater impact of evolution, mutations or genet
Replies: 1
Views: 1090

DNA testing times

... previously run some assays using that primer set, then the analysis is fairly straightforward - just see if the PCR output matches (within normal variation) for the two organisms tested. OK, someone else's turn...

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by jonmoulton
Fri Apr 11, 2014 2:47 pm
 
Forum: Genetics
Topic: DNA testing times
Replies: 2
Views: 2564

Re: Re:

... entire worldview. Good point that I would like to add to! The average IQ should be affected by environment and genetics, and the international variations in IQ should reveal how strongly environment affects these averages. The more variation that is associated with environmental influences, ...

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by wildfunguy
Thu Mar 13, 2014 4:13 am
 
Forum: Human Biology
Topic: Brain size=IQ level theory (Blacks vs Whites & Asians)
Replies: 75
Views: 334105
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