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Mutagens

mutagens

chemical agents that increase the rate of genetic mutation by interfering with the function of nucleic acids. A clastogen is a specific mutagen that causes breaks in chromosomes.


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Re: Theories - Origin of Life

How does one distinguish between what is a random and what is a prescribed cellular response to outside pressure. Didn't Luxorien say that mutagens facilitate the appearance of resistance? If that could be shown for various cases with various mutagens, I would take it to be strong evidence. ...

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by wildfunguy
Sat Sep 28, 2013 5:21 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 560
Views: 906960

A little help

1) all life present nowadays on Earth, yes 2) yes 3) depends what you imagine under playing a role. It can provide mutagens (e.g. light, all kinds of stress, chemicals), but these still provide random mutations, so it's not like something specific. 4) what exactly you mean by vestigial ...

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by JackBean
Wed Jun 26, 2013 2:39 pm
 
Forum: Evolution
Topic: A little help
Replies: 5
Views: 2010

Theories - Origin of Life

... to life. If that is indeed your argument, then I have two challenges to offer: 1) If mutation cannot cause antibiotic resistance, then why do mutagens increase the speed with which resistance-conferring variants arise? 2) If these variants exist in such small numbers, and they get no benefit ...

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by Luxorien
Wed Sep 19, 2012 2:55 am
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 560
Views: 906960

age and cumulative impact of carcinogens

... for carcinogen is wrong, I mistakenly defined "mutagen," not "carcinogen." A carcinogen is just any cancer-causing agent. Many mutagens are carcinogens.

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by wildfunguy
Sat Aug 18, 2012 8:31 pm
 
Forum: Genetics
Topic: age and cumulative impact of carcinogens
Replies: 1
Views: 2908

Theories - Origin of Life

... Or you could take some of those clonal populations and cause them to have a higher error rate in DNA synthesis. (Probably by addition of certain mutagens, or knockout/inhibition of a repair enzyme.) If the result is programmed and has nothing to do with the error rate, then the cell will again ...

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by AstraSequi
Tue Mar 27, 2012 2:25 am
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 560
Views: 906960
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