Fig. 1From: Testing association and maternally mediated genetic effects with the principal component analysis in case-parents studiesCrohn’s disease study. Result of testing association using the max_Z2 with M − F (a), testing maternal effects using the max_Z2 with 2C − F − M (b), and testing association or maternal effects using the max_PC (c). The Y-axis shows –log10(p) at individual SNPs; the X-axis shows SNPsBack to article page