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Dictionary » G » Genetic mutations

Genetic mutations

Definition

noun

Changes in the nucleotide sequence of the genetic material (i.e. DNA, or RNA, in the case of viruses), which are usually caused by copying errors during replication that further lead to base substitution, insertion, or deletion of one or more base pairs.


Supplement

Genetic mutations may be triggered by exposure to ultraviolet or ionizing radiation, chemical mutagens, or can occur deliberately under cellular control during processes such as hypermutation.


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Re:

... seen as the basic step of evolution. One can evolve new traits without genetic mutation (eg quantitative traits); nevertheless most individuals have a few mutations anyway. Let me give you an example from the 1950s (if I recall correctly). It ...

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by robsabba
Tue Aug 25, 2009 8:20 pm
 
Forum: Evolution
Topic: Natural selection is proven wrong
Replies: 177
Views: 16282

Anything beneficial to wrong nucleotide placement in DNA

Well mutations are definitely a way to create genetic diversity, yes. One could wrote a PhD thesis on the subject, or more (as I and many friend from the laab ...

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by canalon
Wed Aug 19, 2009 1:29 am
 
Forum: Cell Biology
Topic: Anything beneficial to wrong nucleotide placement in DNA
Replies: 1
Views: 50

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. ...

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

Question on Predators/ NS

... It must be combined with mechanisms capable of increasing or changing genetic information in order to produce new organisms. In the case of aggressive ... - the invader may extirpate native populations before any advantageous mutations or adaptations can occur or become established.

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by AstusAleator
Wed Jul 29, 2009 2:16 am
 
Forum: Evolution
Topic: Question on Predators/ NS
Replies: 6
Views: 157

Regarding Mutation

... or its fragment) and chromosomes. I do not believe an increase in genetic material occurs as it is just a translocation of genetic material. ... it here and there. They are fun to study. Chromosomal translocation mutations can happen whenever the chromosomes come into contact with other ...

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by kolean
Sat Jul 11, 2009 4:45 pm
 
Forum: Genetics
Topic: Regarding Mutation
Replies: 5
Views: 282
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