sfs
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- Jun 30, 2003
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You do realize that's from the introduction, right? It describes the existing state of knowledge. The paper then proceeds to describe a study of a specific case of HT in some detail, thereby explaining a particular pattern of genetic similarity.sfs posted: "It's a fine example of scientists explaining patterns of genetic similarity"
Really? What were they "explaining" except how further story-telling is covering for prior story-telling? Read the actual article:
Horizontal transfer (HT) is central to the evolution of prokaryotic species. Selfish and mobile genetic elements, such as phages, plasmids, and transposons, are the primary vehicles for HT among prokaryotes. In multicellular eukaryotes, the prevalence and evolutionary significance of HT remain unclear.
So on the one hand, we have the scientific explanation for this segment of DNA that's in a bunch of distantly related organisms: a transposon that spread widely throughout tetrapods at a particular time in the past. Competing with that, we have the creationist explanation which is . . . what, exactly?
Yes, we know some of the mechanisms by which it occurs -- transposition from endosymbionts, infection with retroviruses. There remains much to learn about the mechanisms, however. That's why scientists still have jobs.Remains unclear is an important phrase to dissect. Is there anything clear whatsoever about such mechanisms occurring in eukaryotes?
We've seen every step in the process, yes. We also see the result, e.g. some people with have transferred DNA inserted into their genomes that's lacking in others.Has anyone seen it happen?
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