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markers and generations

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  • markers and generations

    I'm brand new to this DNA topic and I was wondering if someone could point me to some beginning texts that would explain why the more markers you test for the lower the number of generations match? I would think that it would be just the inverse, that the more markers you have tested the farther back you would be able to reach.
    Any texts that would help in clearing this up for me?

    Thanks,
    Chuck

  • #2
    The more markers you test, increases the potential for mutations. The more mutations, the larger the GD. So... on the first few markers, you may have lots of GD 0 or 1 matches, but as you increase how many markers you test, there is a greater odd that there are more mutations, shifting the person to GD 3 or 4. So, lower GD at a higher marker test is more accurate to represent a closer relative.

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