Theoretically, males are expected to cluster around (0.5, 0.5) in the produced scatter plot, while females are expected to cluster around (1.0, 0.0). In practice, when analysing ancient DNA, these relative coverage on both axes is slightly lower than expected, and individuals can cluster around (0.45, 0.45) and (0.85, 0.05). As the number of covered sites for an individual gets smaller, the confidence on the estimate becomes lower, because it is increasingly more likely to be affected by randomness in the preservation and sequencing of ancient DNA.
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