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Talk:Counterexamples to Evolution (view source)
Revision as of 05:55, October 28, 2008
, 05:55, October 28, 2008→Chromosome example: Beneficial mutations do exist.
::::(edit conflict) Corry said "''This is why sickle cell anemia is most prominent in ethnicities from malaria-stricken parts of the world.''" Just because the sickle-cell mutation happened to produce a beneficial ''result'' in one case does not mean it is truly beneficial. Natural selection dictates that anything that is beneficial stays, and anything that does not ''immediately'' benefit an organism is thrown out. If there ever was a beneficial mutation, it would very quickly be passed among ''all'' members of a species. Since all of humanity does not have the sickle-cell trait, the mutation is, hands down, not beneficial when applied across a broad spectrum (which is what would have to occur in order for a species to evolve). [[User:Samd|Samd]] 00:02, 28 October 2008 (EDT)
::::(edit conflict) Corry said "''This is why sickle cell anemia is most prominent in ethnicities from malaria-stricken parts of the world.''" Just because the sickle-cell mutation happened to produce a beneficial ''result'' in one case does not mean it is truly beneficial. Natural selection dictates that anything that is beneficial stays, and anything that does not ''immediately'' benefit an organism is thrown out. If there ever was a beneficial mutation, it would very quickly be passed among ''all'' members of a species. Since all of humanity does not have the sickle-cell trait, the mutation is, hands down, not beneficial when applied across a broad spectrum (which is what would have to occur in order for a species to evolve). [[User:Samd|Samd]] 00:02, 28 October 2008 (EDT)
:::::No- mutations in the genome do not spread like computer viruses. And as above, I said that homozygotes are at a disadvantage, while heterozygotes are at an advantage. If a mutation causes an overall reproductive benefit, in this case by heterozygotes being resistant to malaria and more likely to have children, then that mutation will be spread more than one which does not have a reproductive benefit. [[User:Corry|Corry]] 00:12, 28 October 2008 (EDT)
:::::No- mutations in the genome do not spread like computer viruses. And as above, I said that homozygotes are at a disadvantage, while heterozygotes are at an advantage. If a mutation causes an overall reproductive benefit, in this case by heterozygotes being resistant to malaria and more likely to have children, then that mutation will be spread more than one which does not have a reproductive benefit. [[User:Corry|Corry]] 00:12, 28 October 2008 (EDT)
As Corry said, "random mutations" ''can'' be beneficial, even though that is (usually?) only in specific circumstances/environments. The claim that they can't be is one that leading creationists specifically say is wrong[http://creationontheweb.com/content/view/2996#mutations].
Samd is also correct that it is not beneficial ''overall'', but that doesn't make Andy's claim that it is "never" beneficial correct. And by the way, these rare beneficial mutations do not help the argument for evolution, because these beneficial mutations are still information-''losing'' mutations, whereas evolution requires information-''gaining'' mutations.
[[User:Philip J. Rayment|Philip J. Rayment]] 01:55, 28 October 2008 (EDT)