Negative covariance of ancestry deviations in the Fula. a top right diagonal shows of heatmap shows covariance at genome-wide SNPs; bottom left are SNPs that are significant in either of the ancestry region pair; the diagonal shows the variance and mean in brackets within each ancestry region b the genome-wide distribution of \(\beta\) coefficients, split by ancestry, across all SNPs and normalised to have a maximum density of 1. c the distribution of \(\beta\) coefficients for significant SNPs, normalised to have a maximum density of 1. in panels b and c lines are coloured by ancestry as in panel a