2019-03-23 19:35:55 UTC
Not all mtDNA lineages are equal. They are not. AND, mtDNA
is under selective pressure. Meaning, the better or more
advantageous lineages are selected over the less advantageous.
LM3 was less advantageous.
It's older so it's probably better suited to warmer climates. And...
Remember: Our mtDNA slows down as it ages, some lineages
sooner than others. The quicker it slows down, the quicker you
erase whatever advantageous it offered.
Longevity for the most part. If your mtDNA Peters out you're
probably not going to live into your old age. It's the powerhouse
to the cell, related to everything from our ability to remain
active, fight off cancer and adapt to cold.
BUT THAT POPULATION DIDN'T GO AWAY!
We know hundreds of millions if not a billion or more carry the
LM3 line, thanks to a freak mutation that inserted it into the
nuclear DNA. So even as we know for a fact that the dominance
of the LM3 line was replaced we also know that the people
...heck, if a billion people carry the insert than at least twice
that number can trace their ancestry back to the same LM3
population, they simply lost the insert over the years...
Better still: This all proves that the models are wrong! Our
present models all claim that if there WAS an LM3 line but now
there isn't, all those LM3 folks were replaced. But we know for
a fact that this isn't true! We can even find them by the
hundreds of millions, thanks to that freak mutation copying
parts of their mtDNA line to their nuclear DNA, preserving it
and proving their heritage!