Extended Data Fig. 1: Sex chromosome ratios and kinship analysis.

A, Sex chromosome ratios. For each library, we show the proportion of reads aligning to chromosome Y of the total aligning to either X or Y; individuals determined to be genetically female to the left and males to the right. Bars show 95% binomial confidence intervals (normal approximation) around the mean. See also Supplementary Table 2 and Supplementary Note 5. B, Kinship analysis. Different-individual allelic mismatch rates (orange points) are mostly approximately twice as high as same-individual rates (blue points), as expected for unrelated individuals. The labelled pair (I8930 and I8931, both from White Rock Point), have a rate that is roughly seven-eighths that of the other pairs, which would correspond to a second-degree familial relationship (but with relatively high uncertainty given the low SNP coverage). Bars show two standard errors in each direction around the mean as determined by a Block Jackknife; note log scale for the x-axis.