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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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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: 658

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: 2409

Please answer: Group selection and Sociobiology

... fully understood it yet. I know that group selection is the idea that genetic traits (specific genes or mutations of genes) accumulate in a group of individuals because that trait is advantageous. ...

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by Veritophilia
Sun Feb 23, 2014 11:07 pm
 
Forum: Human Biology
Topic: Please answer: Group selection and Sociobiology
Replies: 1
Views: 971

Re:

... late reproduction by lowering the chance of passing on damaged genetic material is not an adequate answer; because from the perspective ... idea is that menopause is the result of an accumulation of detrimental mutations, which become fixed because there is little selection AGAINST them; ...

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by badgertoes
Sat Dec 28, 2013 9:01 am
 
Forum: Evolution
Topic: Gender divison in two opposites is greatest mistake of manki
Replies: 24
Views: 16342

Re: Re:

... are a continuous stream of "errors" in the replication of genetic information from generation to generation; a substantial amount of ... the more they accumulate the more opportunity there is for compensatory mutations to bring the basic fitness level back to a kind of running equilibrium ...

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by wildfunguy
Sat Oct 19, 2013 9:18 pm
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 7426
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