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Author Topic:   Wells' Icons of Evolution - Peppered Moths
zephyr
Member (Idle past 4578 days)
Posts: 821
From: FOB Taji, Iraq
Joined: 04-22-2003


Message 16 of 88 (103360)
04-28-2004 11:28 AM
Reply to: Message 14 by cromwell
04-28-2004 9:52 AM


Re: The prepared myth
quote:
If you read my first thread,you will see that i don't deny that something has caused the change over of dominant variants.This fact is undeniable.Wells points to it being something yet undiscovered,but due to pollutants.I am saying that it is not happening through the mechanism of natural selection.I am not saying its a fake.but i'm merely saying that the data does not prove that it can be natural selection and that other contributory factors have not been considered.
So, what is your alternative explanation for the correlation between environmental change and allele frequency change? Natural selection is easy to infer, even if the exact factors are uncertain - the environment changed, allele frequency followed. Environment returned to previous state, allele frequency returned as well. I'd like to hear your theory explaining this. I'm sure everyone would.

This message is a reply to:
 Message 14 by cromwell, posted 04-28-2004 9:52 AM cromwell has not replied

  
zephyr
Member (Idle past 4578 days)
Posts: 821
From: FOB Taji, Iraq
Joined: 04-22-2003


Message 39 of 88 (104171)
04-30-2004 12:10 PM
Reply to: Message 38 by KCdgw
04-30-2004 11:02 AM


Re: The prepared myth
quote:
Some mutations occur more often than others because certain DNA sequences lend themselves to being miscopied or for substitutions to occur. Its primarily due to the physical structure of the DNA at those points and its interactions with molecules such as DNA polymerase, and others.
In the case of the peppered moth, however, the rise in the melanic form is NOT due to recurring mutations, simply because the rate of recurrent mutation is nowhere near enough to account for the increase.
May I ask for a minor clarification?
Are you simply saying that the transition from ~0% dark moths to 98% dark is not accounted for by a recurring mutation that made each individual dark? Or do you mean that the rate of recurrence is so low that the dark moths were all likely the descendents of one dark mutant born in the 1800's?

This message is a reply to:
 Message 38 by KCdgw, posted 04-30-2004 11:02 AM KCdgw has replied

Replies to this message:
 Message 40 by NosyNed, posted 04-30-2004 12:14 PM zephyr has not replied
 Message 41 by KCdgw, posted 04-30-2004 1:47 PM zephyr has not replied

  
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