FIGURE 2.

Box plots of ${\widehat{h}}^2$ , estimated from the linear mixed-effect model (Eq. 4) against δ _causal using 5,000 sibling pairs. The other parameter values are the same as in Figure 1, where the true heritability of the phenotype is h ² = 0.5, the minor allele frequencies p _causal = p _tested = 0.2, and 10,000 independent replicates were simulated for each δ _causal value.