two significant eigenvalues, as predicted by theory. This is what is observed (unpublished data), with, as predicted, the admixed population not adding to the number of axes of variation (the third eigenvalue is not significant). In Figure 8 we show a plot of the first two eigenvectors. Note the dispersion of population C along a line. This is diagnostic of admixture. The resemblance of Figures 5 and 8 is striking.
