Katzpur
Not your average Mormon
By the way, here's how Genetic Drift was explained to me:
Put 10 red marbles and 10 blue marbles in a jar. Pick one marble at random and check the color. Let's say it's red. Return the marble to the jar, but also take a marble of the same color from a bottle of spares, and put it in a second jar. The new marble (the one you just put in the second jar) will represent the red lineage. It's the lineage you want to track. Keep repeating this process, picking one random marble each time until the second jar has twenty marbles. (Always return the original marble you picked to the jar you took it from. That jar must always contain 20 marbles.) Of the 20 marbles in the second jar, you might have 8 red ones and 12 blue ones. After you've got 20 marbles in the second jar, start the whole process over again, this time picking marbles from the second jar and adding marbles of the corresponding color from your pile of spares to a third jar. By the time you've got 20 marbles in your third jar, you may have 5 red ones and 15 blue ones. By the time you're working on your fourth or fifth jar, you will likely have only blue marbles. If you have even one red one, though, repeat the process. You are guaranteed to have all blue by the time you get to the sixth or seventh jar. Blue will be fixed and red (the lineage you were trying to trace) will be gone forever.
Depending upon how heavily the continent was populated when Lehi and his small group arrived, intermarriage between his group and the existing population would have made his mtDNA disappear completely. That's why we should not be surprised if we can't find it now. It doesn't mean it was never there. It's just the way genetic drift works.
Put 10 red marbles and 10 blue marbles in a jar. Pick one marble at random and check the color. Let's say it's red. Return the marble to the jar, but also take a marble of the same color from a bottle of spares, and put it in a second jar. The new marble (the one you just put in the second jar) will represent the red lineage. It's the lineage you want to track. Keep repeating this process, picking one random marble each time until the second jar has twenty marbles. (Always return the original marble you picked to the jar you took it from. That jar must always contain 20 marbles.) Of the 20 marbles in the second jar, you might have 8 red ones and 12 blue ones. After you've got 20 marbles in the second jar, start the whole process over again, this time picking marbles from the second jar and adding marbles of the corresponding color from your pile of spares to a third jar. By the time you've got 20 marbles in your third jar, you may have 5 red ones and 15 blue ones. By the time you're working on your fourth or fifth jar, you will likely have only blue marbles. If you have even one red one, though, repeat the process. You are guaranteed to have all blue by the time you get to the sixth or seventh jar. Blue will be fixed and red (the lineage you were trying to trace) will be gone forever.
Depending upon how heavily the continent was populated when Lehi and his small group arrived, intermarriage between his group and the existing population would have made his mtDNA disappear completely. That's why we should not be surprised if we can't find it now. It doesn't mean it was never there. It's just the way genetic drift works.
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