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

... 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 ...

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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

... 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. ...

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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

Isogamous organisms

... between the gametes, both are 100% identical (of course, there could be mutations, but no allele differentiation in matching-type regions, like the ... and with a sexual reproduction. In isogamous organisms we have a small genetic differentiation between the gametes, as the + and - one I said. ...

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by jaumzaum
Thu Oct 02, 2014 11:47 pm
 
Forum: General Discussion
Topic: Isogamous organisms
Replies: 0
Views: 1511

A question about evolution.

... organisms. What makes a living thing develop these features? Genetic program. Think of it as a computer program that starts executing ... change over time) works via negative selection. That means that random mutations appear all the time and those that are detrimental to survival ...

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by Cat
Sun Apr 20, 2014 3:18 pm
 
Forum: Evolution
Topic: A question about evolution.
Replies: 1
Views: 2135

Hyperadrenergic POTS

... by these patients than by those with neuropathic POTS. A specific genetic abnormality has been identified in a kindred with hyperadrenergic ... much about the importance of a functional NET. Although functional NET mutations might be infrequent, pharmacological NET inhibition is very common. ...

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by rmorrison
Wed Mar 19, 2014 5:38 pm
 
Forum: Human Biology
Topic: Hyperadrenergic POTS
Replies: 0
Views: 6099
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