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Author | Topic: About New Lamarckian Synthesis Theory | |||||||||||||||||||||||||||
zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
No. You started the thread, you pony up the evidence.
So can we agree that none of us can bring the needed evidence? It would be a very good start. Of course it pains,especially for you anderstandably, as after 250 years of intense research, the results are so meagre for the randomness of mutations. After all a theory or a hypothesis does not always need to bring the needed evidence.Do you think it is realistic or even normal to expect a non specific scientist or even a specific one to provide all you want to be persuated, which i don't intent to. On the OP I related some work done in the field. Can you comment on them?
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zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
natural selection is given as the means by which the environment affects the genome.
No, I mean direct environmental effect on deep DNA. I quote from TIME MAGAZINE, "WHY YOUR DNA ISN'T YOUR DESTINY by JOHN CLOUD:"The stress of fear, lack of food, lack of mating opportunities etc., are the main causes of soft or deep changes. As these stresses are empathetically transmitted not only to life peers, but to extant population in wild areas, and to proximal generations , the resultant beneficial mutations are fairly quickly established, reducing the time needed by natural selection to do its work. This long time effect is the main cause of speciation as it expresses deep survival needs."
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zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
But the evidence that there is for random mutations is rather compelling. The evidence for guided mutations is virtually non-existent. Is it so difficult that compelling evidence to presented for? I can't prove the non-existance of something that it does not exist.
Epigenetics is not the same thing as guided mutations. Period. As far as we know up to now. But guided mutations are at least having equal chances to exist as random mutations do, regarding the realy slim amounts of evidence for each of them. From JOHN CLOUD's "your DNA ISN'T YOUR DESTINY" I quote: "For deep evolutional changes in multi-cellular organisms, mutations on DNA to be beneficial, need to be prepared by epigenetic phenotype changes, which facilitate these types of mutation. In one cell and other of low organization evolution is endogenously forced by life momentum." Edited by Admin, : Fix quotes, improve formatting.
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zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
I have to state and apologise for it, a mistake made unintentionally by me. The quotes mentioned in messages 44 and 46 in replies to nwr and HBD are not from WHY DNA ISN'T A DESTSTINY FOR YOU by JOHN CLOUDS. The mistake had been caused from a mixing up of my notes
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zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
My intention is to discuss the matter, not to convince anybody.
The article i brought here it is enough for the beginning of the discussion. I think there isn't any need to fo relate passages of it. The important question that arises from it is: Is it correct to stick on the up to now knowledge that epigenetic changes are always remaining epigenetic and don't pave the way, in the long run, to deep DNA changes?
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zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
...apparently less overt acquired characteristics *can* be inherited, though they are thought to be impermanent and in the absence of the original environmental factor will fade away and be lost.
Yes I agree.But what if theoriginal factor will not fade away? Has science any answer on this? ------------------------------------------------------
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zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
Epigenetics is completely off topic unless you can show how it influences sequence changes over time. This does not preclude that it could happen. I can not prove how does it happen (becouse of the time limit, or limited knowledge) neither you manage after so intence research to prove it couldn't happen. Edited by zi ko, : No reason given.
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zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
However, to make a case of Lamarckian inheritance, you would really need to see these effects transmitted to many generations, not only to the immediate next generation. in fact the effects were lasting in many generations.
There's another effect that I didn't see in that Time report (or perhaps I missed it). Namely that some of these stress conditions are known to increase mutation rates, which can affect the rapidity of evolution.
You can't see mutations in metazoans and so in man.
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zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
If all environmental factors are subject to change, then science's answer is: "Those types of environmental factors do not exist."
I don't follow you.
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zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
You're not asking anything complicated. It doesn't seem to me so simple. We are talking about thousands or more of years. Is it sensible to equate one four generations and so long spans, at their affects on genome? Any way we just don't know.
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zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
You are asking about environment factors that do not fade away, but can you name one that doesn't fade away?
Lack of food for maybe a thousand or more of years.Or lower environmet temperature for amillion of years.
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zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
It is your theory. You need to present the evidence that it does happen as you claim it does. How does epigenetics guide mutations so that they are not random with respect to fitness?
You are right. But surely you and science in general on lack of evidence against a theory should keep an open mind of its possibility to happen.
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zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
But we all know zi ko doesn't want to discuss epigenetics ... Why not?
he wants to discuss directed mutations And again why not? What makes you to believe otherwise? Or it is an avasion?
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zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
Science is always open to new evidence.
I agree. . Ufortunaly in science there are theories,not proved, but just accepted by its followers as true, for not exactly scientific reasons, as f.e randomness in mutations, which they act against probing new or old ideas , as it did happened with Lamarckism. I know your arguments. They are so few. I understand the difficulties (long time scale, focusing in mutations on metazoa etc). The same it applies to environmentally guided mutations. I just hope you aknowledge this.
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zi ko Member (Idle past 3641 days) Posts: 578 Joined: |
environment --> epigenetics --> mutation --> evolution --> preservation of life
You are right. But in my opening pos i did put some thoughts and data i wanted and insit to discus.Not to present a new theory.Thiw was not my purpose.
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