Molecular Population Genetics and Diversity through Mutation

That's how increases in genetic diversity are proved by math, by simply assuming it's possible when it's not.

You have a big problem with context. The context is that selection, random or otherwise, gets new gene frequencies, new gene frequencies bring out new phenotypes, getting new phenotypes requires losing alleles, reproductive isolation of these phenotypes can produce a new subspecies which must trend toward reduced genetic diversity as a result. This is evolution. There's no point in examining other contexts when I know this is evolution and it costs genetic diversity.

I agree with this post in general. But I still take the position that mutations aren't going to make a difference in the outcome of reduced genetic diversity in an evolving population. You could double the genetic diversity in a stable population and still, when selection or the random selection of the splitting off of a subpopulation occurs, new phenotypes are going to emerge simply from the new higher gene frequencies, and former phenotypes that are now low frequency will fade away, while alleles competing with the new phenotypes will necessarily also be reduced and perhaps disappear. You may (hypothetically) have lots of mutated alleles to begin with, but when you are getting evolution there's no more genetic increase, just reduction. And evolution IS the point, isn't it?

It's like the fossil record and the strata are evidence for the Flood, it's a general compatibility between the observed physical facts and the Biblical revelation.

I don't know what your problem is, so I'll just ask how you expect to get something other than the BB's, bb's and Bb's of a particular genotype in the process of microevolution.

Oh but they are, in the general sense I said. Dead DNA great evidence for the Fall ...

The billions of dead things found in the strata are superb evidence for the Flood.

The way added mutations could mess up a breed is by changing major characteristics. If you've been working for decades to get a perfect purebred Whozit you don't want a mutation to pop up for a Whatzit. You DO NOT WANT this new trait in your breed. What's so hard to understand about that?

And the reason I make this argument is that I keep hearing how mutations can just increase genetic diversity after you have a breed or subspecies as if that would be a good thing. First it doesn't happen, you aren't going to get new traits from mutations ...

... but if you did it would only prevent the formation of a breed or a recognizable species in the wild.

I think you've mistaken Mr. Evo Bias for that friend. You assume mutations without any warrant for assuming it.

I can hardly believe you are that dense. Perhaps it's intentional. Or maybe you ARE that dense.EACH of those breeds has its own specific genetic substrate that EXCLUDES the genetic diversity in the ENTIRE REST OF THE DOG SPECIES. Each has its own set of characteristics and the genetic material that underlies them. Each has ONLY its own genotype for its own phenotype. It DOESN'T have the genetic stuff for the other breeds. There may be many different versions of chihuahuas but each has its own genotype and not that of the others. There is a specific recipe you could say for each breed. And if you are a breeder of a particular breed you don't want the other characteristics popping up after you've established it.

Dogs are marvelously genetically diverse AS A KIND, or family or Species or whatever the category is, which is why so many breeds can be developed from that Kind. Mutations had nothing to do with their diversity, it's built in to the Kind.But to get each breed requires LOSING the genetic stuff for all the other traits that don't belong to the breed but continue in other breeds and the Dog Population as a whole.Why is this so hard to get?

The breeds do NOT exhibit high GENETIC diversity. They can't, because they DON'T have all those genes for other traits. Each breed has to have low genetic diversity unless it's been mixed with others.

You are talking about PHENOTYPIC diversity. Your doing that raises all kinds of suspicions of course, since I couldn't have been clearer over at least the last ten years that I'm talking about GENETIC diversity.

Each chihuahua DOESN'T have the stuff for the other chihuahuas ...

Well, they're both populations that began with small numbers and continued in reproductive isolation. There may have been other factors but those are certain and primary.

It's the starting from small numbers that causes the new gene frequencies that are the basis for the changes in the population ...