Thanks, guys! That is a lot of help. I should have realized this was Meldrum-driven, but I gave him more credit than that. As a side note, if Meldrum is winning PhD chemist seminary teachers over FARMS, it is no wonder FARMS would be doing a full court press against him. They used to only compete with Sunstone for that demographic.
The Dude wrote:
Yep, it's gone. IIRC, we didn't really get into mtDNA because David's pseudoscientific façade was constructed from supposed links in Y chromosome analysis.
That's too bad. Both that and your LDA spiritual experience threads are real losses. Should I be expecting my friend to throw Y chromosome pseudoscience my way at some point?
Don't get sucked into arguing about absolute dates and mutation rates. You can rule out the possibilities your friend is pushing by understanding the correct relationship between the different X lineage sub clades, as Simon points out on his blog. That's all you need.
I had already laid out the difference in sub clades, but to me the difference between X2a and X2*/b/g/etc is most apparent by noting time of divergence. So could you flesh out the real importance of the distinction independent of timing? For example, suppose we were determined to stick with the superfast Parsons mutation rate, am I hearing that one couldn't get X2a out of one of the middle East X2s via founder effect?