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Thread: Should ancient samples be used with modern calculators?

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    Should ancient samples be used with modern calculators?

    To my understanding, the categories on modern calcs are derived from genomic frequencies of modern populations, so would it therefore not make sense to use ancient samples with them?

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    I find this a source of confusion as well. There are several calculators that are modern but include ancient populations. I'm not an expert so a lot of things are above my head. But I also have the same question.

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    Quote Originally Posted by Sorcelow View Post
    To my understanding, the categories on modern calcs are derived from genomic frequencies of modern populations, so would it therefore not make sense to use ancient samples with them?
    That's correct.

    Although it is possible to approximate ancient ancestral populations or components to some degree by using both ancient and modern samples to design tests.

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    Quote Originally Posted by Generalissimo View Post
    That's correct.

    Although it is possible to approximate ancient ancestral populations or components to some degree by using both ancient and modern samples to design tests.
    It is far better to go with an approximation than to have nothing at all.
    But the assumptions or bases of the calculation need to be stated clearly and upfront.

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    Quote Originally Posted by Generalissimo View Post
    That's correct.

    Although it is possible to approximate ancient ancestral populations or components to some degree by using both ancient and modern samples to design tests.
    Interesting, so using a test such as eurogenes k7 will produce more accurate results than a test that was optimized for modern populations such as k15?

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    Quote Originally Posted by Sorcelow View Post
    Interesting, so using a test such as eurogenes k7 will produce more accurate results than a test that was optimized for modern populations such as k15?
    Definitely, because the K15 is designed to pick up very recent drift so that it can catch subtle differences between many modern-day ethnic groups.

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    Quote Originally Posted by Generalissimo View Post
    Definitely, because the K15 is designed to pick up very recent drift so that it can catch subtle differences between many modern-day ethnic groups.
    Interesting, it makes sense, I was getting strange results when plugging in ancient samples with these modern calcs. Thanks for the clarification.

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