Panthera tigris FC said:You are disregarding population size in your estimates. In one individual, yes, 520 base pair mutations is ridiculous...but we aren't talking about a single individual but large populations (that would have had some level of sequence diversity at the speciation event to begin with). When you look at it that way, that is not a great deal of change over the timescale, given the population.
But each mutation needs to be fixed in the population as a whole to become part of the genetic makeup of the species. So I would have thought the mutation affects the individual, and since it is beneficial, becomes part of the genome. So this is roughly 520 beneficial mutations to individuals per generation. Still a lot. Do we know how large the original populations were?
Panthera tigris FC said:But if God created Adam and Eve and then let 'nature takes its course' you would need to come up with something far greater than the 520 bp per generation per individual figure that we were talking about above. How can you be incredulous about one explanation and posit a less likely scenario as an explanation for your model?
How much in % terms of a whole species Genome could two individuals possess? Would the model be possible given more time?
Panthera tigris FC said:Variation only enters a population through germ line mutations that are inherited and either are lost or become fixed. How would your God have achieved this? why doesn't he continue to do it? Why would he introduce the variations that lead to devastating genetic disease? Why do the mental gymnastics to explain this? The more likely scenario is already available. This would be an example of disregarding the obvious explanation to fit your preconceived conclusion (ie special creation)....where is Occam's Razor now?
Like I have said in the past I have not come to any fixed conclusions about these things and am just asking questions that interest me.
Panthera tigris FC said:First off....only the most extreme adaptationist would claim that everything in a genome is there for its selective advantage. There are variations in genomes that are there through chance mutation...genetic drift explains this type of variation. Selective breeding by humans has done just that...selected variations in the wolf population that were desirable for the breeders. Over time and through constantly selecting for these variants, even if the mutations underlying them were rare, the impressive morphological differences will start to show. This has occurred in all domestic species (check out the wild version of corn, teosinte...massive difference). The traits of the Shi Tzu, would probably have been a disadvantage for the wolf, however they were an advantage for the Shi Tzu, because of its breeders. Again, this is very common in domesticated plants and animals (what about the loss of head shattering in wheat for seed dispersal...that is certainly not helpful to the plant, but excellent for the farmer and one of the key mutations in the domestication of wheat ~8,500 years ago).
Surely an allele must be of some advantage to become part of the genome of a species, except if it is a short lived non-beneficial mutation. But overall good answer, thanks.