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Author Topic:   Favorable Mutations? Help me!!
MarkAustin
Member (Idle past 3815 days)
Posts: 122
From: London., UK
Joined: 05-23-2003


Message 12 of 56 (54557)
09-09-2003 11:40 AM


On the sickle cell anemia mutation, is is also noteworthy that it appears to have happened in four different locations and three different forms (in two of the locations the mutation is identical). See this site for information. Ther's an animated map showing the spread near the bottom.
Another favourable mutation is described here. This mutation confers immunity to arthritis, and has, indeed been traced to a specific 18th Century couple.

  
MarkAustin
Member (Idle past 3815 days)
Posts: 122
From: London., UK
Joined: 05-23-2003


Message 17 of 56 (54698)
09-10-2003 4:42 AM
Reply to: Message 13 by Fred Williams
09-09-2003 2:48 PM


Re: Nylon is just pantyhose
quote:
The pertinent question to ask is, what evidence exists where the mutated type is more viable than the parent type in a normal environment?
Does the nylon example qualify? A quick read of the link and you will see it doesn’t. A huge cost is incurred in efficiency, and thus in a normal environment the mutated strain could not last long (AiG also argues plasmid xfer, but the enzyme effeciency loss alone in the article cited by zephyr is sufficient to dismiss mr. nylon as a hero of the evolutionary faith).
Irrelevant. The new enzyme confers the bacteria an advantage in its current environment. That's all that matters. In any case, now that the enzyme exists, I confidently expect that evolutin will fine-tune it for increasing efficiency.
It's also interesting to note that the mutation in question is a frame-shift mutation, adding (as I recall) 1 base to the sequence and thus scambling all the subsequent 3-base "words", a mutation type that creationsists have long claimed to be impossible.

This message is a reply to:
 Message 13 by Fred Williams, posted 09-09-2003 2:48 PM Fred Williams has replied

Replies to this message:
 Message 18 by Fred Williams, posted 09-12-2003 1:54 PM MarkAustin has replied

  
MarkAustin
Member (Idle past 3815 days)
Posts: 122
From: London., UK
Joined: 05-23-2003


Message 26 of 56 (55264)
09-13-2003 4:42 PM
Reply to: Message 18 by Fred Williams
09-12-2003 1:54 PM


Re: Nylon is just pantyhose
quote:
quote:
In any case, now that the enzyme exists, I confidently expect that evolutin will fine-tune it for increasing efficiency.
Yes, I know, you have a very strong faith. If evolution were true, you should be able to document for me a myriad of examples where a mutated enzyme undergoes additional mutation to increase its efficiency. What do you have to offer?
Please note, I did not say I had faith, I said I expect. I was making a prediction that the gene will be observed to improve over time. That's what science about - making (and testing) predictions.
quote:
quote:
It's also interesting to note that the mutation in question is a frame-shift mutation, adding (as I recall) 1 base to the sequence and thus scambling all the subsequent 3-base "words", a mutation type that creationsists have long claimed to be impossible.
Hmm, I don’t recall reading in any of the creation science literature of this. Can you provide an example? Methinks a retraction is in order
I will make a partial retraction. I meant to say that creationists claim this type of mutation is always harmful. I have had this said to me in debate by creationists whenever I bring up any other type of mutation than point mutations.
Indeed many creationsist sites claim that virtually all mutations are harmful.

This message is a reply to:
 Message 18 by Fred Williams, posted 09-12-2003 1:54 PM Fred Williams has replied

Replies to this message:
 Message 30 by Fred Williams, posted 09-24-2003 2:26 PM MarkAustin has not replied

  
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