Dictionary » N » Natural mutation

Natural mutation

natural mutation --> spontaneous mutation

A mutation which occurs by itself without first being affected by a mutagen, for example during the process of dNA replication. Spontaneous mutations arise at a remarkably constant rate. The rate that spontaneous mutations arise has been used as an evolutionary clock to estimate how closely related two (or more) separate species are to each other.


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How Does Natural Selection Create Ordered Variation?

... sums up the issue. I'll quote wildfunguy here: The intuition is that natural selection can only block a certain amount of mutation. But in actuality, natural selection can only let through a certain amount of mutation. ...

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by Doom
Wed Jan 15, 2014 6:18 am
 
Forum: Evolution
Topic: How Does Natural Selection Create Ordered Variation?
Replies: 7
Views: 3800

Re: Beneficial mutations vs harmful

Natural selection; survival to reproduce. Collections of genes (or more accurately a given ... fitness, tend to survive to reproduce more often than those without. Basically harmful mutations tend to lower fitness, whereas beneficial mutations tend to increase it. Or rather ...

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by NMLevesque
Fri Nov 22, 2013 6:51 pm
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 8517

Beneficial mutations vs harmful

To put it simply... The intuition is that natural selection can only block a certain amount of mutation. But in actuality, natural selection can only let through a certain amount of mutation. Creationists ...

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by wildfunguy
Sat Oct 19, 2013 9:38 pm
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 8517

Re: Re:

... 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 ... intuition I've had about this issue. We have this intuition that natural selection is working at a fixed rate. If the mutation rate increases ...

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by wildfunguy
Sat Oct 19, 2013 9:18 pm
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 8517

Beneficial mutations vs harmful

Neutral mutations, as per their definition, are neutral and have no effect so they are neither favored or penalized by natural selection. Of course it is very difficult to determine what mutations are truly neutral, but I guess ...

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by biohazard
Tue Oct 08, 2013 12:39 pm
 
Forum: Evolution
Topic: Beneficial mutations vs harmful
Replies: 12
Views: 8517
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