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Is there any proof of beneficial mutations?

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Author Topic:   Is there any proof of beneficial mutations?
Dogmafood
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Joined: 08-04-2010

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Message 33 of 166 (579777)
09-06-2010 12:40 AM

Cause of mutation?
This may be a different subject.
​
The environment selects for survival after a mutation has occurred. Is there evidence that the environment influences mutation before the mutation occurs?
​
eg; does the presence of nylon cause the bacteria to develop a taste for nylon?
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Dogmafood
Member (Idle past 370 days)
Posts: 1815
From: Ontario Canada
Joined: 08-04-2010

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Message 35 of 166 (579781)
09-06-2010 1:09 AM 		Reply to: Message 34 by Nij
09-06-2010 12:56 AM

Re: Cause of mutation?
I dont mean to infer any consciousness.
​
So the environment never causes a particular mutation to occur? Or, any mutation may occur in any environment?
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Dogmafood
Member (Idle past 370 days)
Posts: 1815
From: Ontario Canada
Joined: 08-04-2010

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Message 41 of 166 (579790)
09-06-2010 1:34 AM 		Reply to: Message 36 by AZPaul3
09-06-2010 1:10 AM

Re: Cause of mutation?
What comes close, though, is the fact that when under environmental stress a colony of bacteria will often quicken their individual mutation rates in hopes of hitting on some useful mutation before the colony dies out completely (Adaptive Mutation). But this is normal random mutation (though sped up) without any targeted goal.
​
I dont mean to imply consciousness but does this not suggest it? Why should mutations increase when the organism is under stress?
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Dogmafood
Member (Idle past 370 days)
Posts: 1815
From: Ontario Canada
Joined: 08-04-2010

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Message 43 of 166 (579792)
09-06-2010 1:39 AM 		Reply to: Message 40 by Dr Adequate
09-06-2010 1:33 AM

Re: Cause of mutation?
Look at that. You answered me before I asked the question.
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Dogmafood
Member (Idle past 370 days)
Posts: 1815
From: Ontario Canada
Joined: 08-04-2010

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Message 46 of 166 (579798)
09-06-2010 1:56 AM

Christ, you people are smart! I'd better get mutating.
  
Dogmafood
Member (Idle past 370 days)
Posts: 1815
From: Ontario Canada
Joined: 08-04-2010

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Message 100 of 166 (580587)
09-10-2010 7:41 AM 		Reply to: Message 98 by Percy
09-10-2010 7:30 AM

Re: Cause of mutation?
I find it truly astounding how successful organisms are at randomly producing a particular mutation that lends them immunity to a particular randomly appearing pathogen. The odds seem to be so incredibly high.
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Dogmafood
Member (Idle past 370 days)
Posts: 1815
From: Ontario Canada
Joined: 08-04-2010

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Message 105 of 166 (580599)
09-10-2010 8:12 AM 		Reply to: Message 102 by Annafan
09-10-2010 7:59 AM

Re: Cause of mutation?
Let's also not forget that there might be multiple (many?) different mutations that result in immunity, and that there might be a range of degrees of immunity. It's typically not like one particular mutation is needed. An attack mechanism can likely be crippled in several different ways.
​
I suppose that they fail more often than not. Is that true?
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Dogmafood
Member (Idle past 370 days)
Posts: 1815
From: Ontario Canada
Joined: 08-04-2010

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Message 106 of 166 (580600)
09-10-2010 8:14 AM 		Reply to: Message 105 by Dogmafood
09-10-2010 8:12 AM

Re: Cause of mutation?
Is that true?
​
I guess not. Thanks Percy.
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