Genes and Age

Genetics as it applies to evolution, molecular biology, and medical aspects.

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ameoba
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Genes and Age

Post by ameoba » Sun Apr 02, 2006 9:50 am

Is it possible to determine how old a gene is? What I mean is that can you for example take a Chimpanze's gene and by calculating mutation rates (ect.) determine how old a human's gene is (quite confusing) but I know I'm on to some here. Any input would be quite interesting to read. :)

raju
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Post by raju » Sun Apr 02, 2006 1:21 pm

hi
raju here,
gene mutation is not dependent on the internal cell factors but on the external factors . i meen that if u need to get the info as to how old an organism is by seeing the mutation rate of the cell u need to have all the detail of what ever condition change that have happen in the past so i thing it is an impossible task
:)
the organisms that survive r not the one which r strongest nor the one which r briliant THEY R THE ONE WHICH RESPOND TO CHANGES IN NATURE FIRST

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MrMistery
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Post by MrMistery » Sun Apr 02, 2006 7:15 pm

You can't do that, but you can determine in what order organisms evolved by the distances between their loci at a specific trait. It is done to determine classification. It is a way of saying how old a gene is. But it ain't exactly telling you the age.
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

ameoba
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Post by ameoba » Mon Apr 03, 2006 10:38 am

Thanks raju
What you are proposing here, is that the same as the whole Lamarckism and Darwnism thing. Did Lamarck not say that the enviroment changes the species?
All I'm saying is that if one specie evolved from the other over a period of time then surely one is able to use some sorf of method to determine the genes age? Or am I wrong? :? :oops:


raju wrote:hi
raju here,
gene mutation is not dependent on the internal cell factors but on the external factors . i meen that if u need to get the info as to how old an organism is by seeing the mutation rate of the cell u need to have all the detail of what ever condition change that have happen in the past so i thing it is an impossible task
:)

ameoba
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Post by ameoba » Mon Apr 03, 2006 10:44 am

Will the distances between their loci be determined be time dependent?

MrMistery wrote:You can't do that, but you can determine in what order organisms evolved by the distances between their loci at a specific trait. It is done to determine classification. It is a way of saying how old a gene is. But it ain't exactly telling you the age.

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MrMistery
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Post by MrMistery » Mon Apr 03, 2006 5:47 pm

Parsimony gives you the highest probability of the way things evolved. So it will show you a probable order in which things evolved.
It's main flaw is that you will never be sure it is the right one.

PS: Don't misunderstand "distance between loci". It's a figure of speech referring to time, loci don't travel on a chromosome. That's how i screwd it up the first time i heard about the process :)
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

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