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There is no such thing as a nationality gene. When a genetic analysis shows you have some particular background, that is not based on one gene, but on large-scale patterns of genes. Statistical analysis has shown that some constellation of genes is common in people from some place. If one of your parents has part of a pattern and the other parent has the other part, both below the threshold that registers as that constellation, they may come together in a child. Sometimes, multiple places may have thee same partial pattern, so the part of the pattern one parent had may be identified as Sicilian, the part of the pattern the other parent had may be identified as Egyptian, and when you put them together in the child, suddenly, the child comes out as matching the Tunisian.

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Q: How can I have a higher percentage of a nationality gene than either of my parents - even combined?
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