Posted by:
SL Cabbie
(
)
Date: July 09, 2016 10:57PM
And in my view, that's a good thing. When one of my siblings graduated from a really prestigious university, the speaker was Gary Trudeau of "Doonesbury" fame. Mr. Trudeau endorsed the idea of students and others who "asked particularly 'impertinent' questions." I think what he was referring to was the tendency of many "faculty sorts" to dismiss such "distractions" out of hand.
Here goes my best effort (some of which is admittedly subjective):
As far as Native American mitochondrial DNA haplogroups, there are five known to exist in North America in pre-Columbian times. Those are A,B,C,D, and X... A haplogroup is simply an "arbitrary classification" based on common sequences of the base pairs of DNA, A,C,G,T, and since "large numbers" are involved, the science and mathematics are fairly precise. BTW, a sixth hg, Haplogroup M, was found in some ancient remains up north in the Yukon, but it has not been found in contemporary populations, giving rise to the speculation it may have "gone extinct." "M" is one of the oldest hg's and is found widely in Siberia and elsewhere in Asia. Its possible presence is this hemisphere isn't surprising.
http://www.andywhiteanthropology.com/blog/haplogroup-x2a-and-the-peopling-of-the-americasHaplogroup X is another "old" one. We know the relative age by the number of mutations; they also point to the geographic distribution--within limits--as well. In the Western Hemisphere, X2a and X2g are found here and not in the Old World, and matters are still being sorted out. The other four hg's are found in Asia, and it's noteworthy they existed among the Altai people of Siberia.
When word got out that Eske Willerslev had sequenced the mtDNA of "Kennewick Man" (known to be ~9,000 years old), I sent Simon a little "what if" note, expressing a "hopeful fantasy" that KM's mtDNA would turn out to be X2a...
I'm still whistling over that one (and so was Simon. I was also in contact with Jennifer, the sharp little microbiologist mentioned in Andy White's blog above. Alas, she'd been privy to the information beforehand, but I did get to send the transoceanic news to Oz).
Okay, lessee: Your characterization of Native American DNA as "diverse" is a relative proposition. Extensive work and analysis has pointed to how the original five hg's were distributed (with "genetic drift" obviously being a factor), and what we know is that given those parameters and within those subsets, there is indeed diversity. But that diversity operates within the five known haplogroups.
Moving on: I saw the report of Australasian DNA in a South American population, but what I want to question are its origins since it was found on the Atlantic side of the continent (if memory serves). That being the case, the likely source would be some native Aussie aboriginals--or perhaps from New Guinea or other South Pacific locale--that were taken aboard, say a Portuguese, English, or Spanish vessel sometime after 1492.
It's not unreasonable to believe--as Simon does--that ancient Polynesians--perhaps from Easter Island--did make landfall somewhere on the Pacific coast, but we haven't found any genetic evidence to that effect.
I had to Google the "Seri People," and I see no reason to suspect that the remaining individuals in that tribe wouldn't be classified as "Indians," aka "Native Americans." But given what I've seen of the average IQ and critical thinking skills of some LDS apologists, I wouldn't be surprised if they'd seized upon those folks as a "talking point."
http://www.uapress.arizona.edu/onlinebks/SERIS/HISTORY.HTMAs far as that "15,000 year" date, you can place me squarely in the unrepentant "Clovis was probably first" camp, and I can point to senior individuals in the field--far more knowledgeable than I--who believe similarly. These include Vance Haynes, Anna C. Roosevelt, Dena Dincauze, Stuart Fiedel, and Gary Haynes (no relation to Vance Haynes).
On the other side of the debate--which often winds up fairly acrimonious--are Dennis Jenkins, Tom Dilehay (of Monte Verde fame/notoriety), Michael Waters, Thomas Stafford, James Adovasio (Meadowcroft) and "fringe sorts" such as Dennis Stanford (who's still promoting his "Solutrean Solution" even though it's past the point of even life support).
Have fun... I'm just a layman with an obvious "science interest and aptitude," but I was shrewd enough way back in my teens to recognize that the Book of Mormon was bunk. I even recognized how the language was "lifted" from the King James Bible, and I take some credit that I was following in none other than Mark Twain's "footsteps" in reaching that conclusion. My moniker's initials reflect that conclusion, although any "connection" I made was obviously strictly sub-conscious.