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Talk:Young Earth Creationism (view source)
Revision as of 02:34, September 15, 2008
, 02:34, September 15, 2008→races: Clarifying neutral and positive changes.
As for neutral mutations, of course they exist . Neutral mutations include silent mutations where the DNA sequence is changed but the amino acid sequence remains unaltered. Equivelent mutations, where the DNA sequence changes and the amino acid sequence changes as well, where the functional domains and the protein folding remains intact- allowing normal functioning of the protein ( ie. the changed protien conserves size, charge etc. of the amino acid substituted). However this is not what I was refering to. I was asking how creation science accounts for populations with more than four different DNA sequences at a sigle genetic loci, which result in more than four different amino acid sequences. I was specifically refering to cases where these protiens result in different, but positive phenotypes. The maximum number of these different phenotypes (coded from a single gene like discribed above) should not exceed 4 if the entire population descended from two diploid parents (as would be the case for animals from Noahs ark). This is of course only if you assume no mutations result in new positive allels(ie mutations that alter proteins to have a new '''positive''' function).
As for neutral mutations, of course they exist . Neutral mutations include silent mutations where the DNA sequence is changed but the amino acid sequence remains unaltered. Equivelent mutations, where the DNA sequence changes and the amino acid sequence changes as well, where the functional domains and the protein folding remains intact- allowing normal functioning of the protein ( ie. the changed protien conserves size, charge etc. of the amino acid substituted). However this is not what I was refering to. I was asking how creation science accounts for populations with more than four different DNA sequences at a sigle genetic loci, which result in more than four different amino acid sequences. I was specifically refering to cases where these protiens result in different, but positive phenotypes. The maximum number of these different phenotypes (coded from a single gene like discribed above) should not exceed 4 if the entire population descended from two diploid parents (as would be the case for animals from Noahs ark). This is of course only if you assume no mutations result in new positive allels(ie mutations that alter proteins to have a new '''positive''' function).
-Damien
-Damien
: I think that we are talking about "neutral" and "positive" in different ways, and that is my fault for not being clear what I was referring to. I was using the term in the sense of genetic ''[[information]]''. So when I said that many mutations are neutral, I was meaning that they neither destroy nor create ''information''. Think of a cake recipe. The recipe contains ''information'' on how to make a cake, including a list of ingredients and instructions on how to put them together. Now suppose that someone wants a copy of your cake recipe, so you type out a new copy for them. But in making this copy, you accidentally change some of the information. There are various changes that could hypothetically occur. Let's just pretend that one of these changes adds information on how to ice the case (your recipe didn't include icing). This would be an ''information-gaining'' change (mutation). Of course this could never occur accidentally, yet this is what evolution proposes. Alternatively, let's suppose that you accidentally skipped a bit of the recipe, and left something out. This is a very real possibility, and is what we actually observe in living things: mutations ''destroying'' information.
: But there are a couple of other possible changes/mutations. Perhaps where the recipe called for 2.5 cups of water, you typed it as 2.8 cups. In this case, the change is not neutral the way you used the term (it is a real change), but there is no ''new information'', nor a ''loss of information''. It's merely ''changed'' information. It may even be a beneficial one if the original recipe was a bit dry. The remaining possibility is that the recipe calls for cherry flavouring, and you mistype that as sherry flavouring. So it's not a quantity that has changed in in this case, but a different ingredient. But it's only going to change the flavour; it's not new information like adding the instructions for icing is.
: So your allele change is more like one of the last two. It's not new information, just a change in information, so is neutral as far as information gain or loss is concerned.
: And to forestall what the next question might be, if your mistyped "flour" as "sherry", this is are more substantial change, but the result is that you no longer have a cake, just a mess instead. In this case you have actually ''destroyed'' the cake recipe, so this counts as a ''loss of information''.
: [[User:Philip J. Rayment|Philip J. Rayment]] 22:34, 14 September 2008 (EDT)
==mention other creation theories==
==mention other creation theories==