iplotRF example: The heatmap displays LOD scores indicating linkage between all pairs of markers. Blue indicates large LOD with rf < 1/2; red indicates large LOD but with rf > 1/2. Click on the heatmap to view the corresponding two-locus genotype table to the right and LOD scores for selected markers, below. In the subsequent cross-tabulation on right, hover over column and row headings to view conditional distributions. In the panels below, hover over points to view marker names and click to refresh the cross-tab and lower panels with the selected marker.