add example where whole line for father and mother only references one gene each

pyrat-data-2-mutations.csv

@@ -21,3 +21,5 @@ ID-019,Line-BC,01/12/2025,ID-F11,ID-M12,End of experiment,Mut-B,wt,Mut-C,het,,,M
 ID-020,Line-BC,01/12/2025,ID-F11,ID-M12,End of experiment,Mut-B,wt,Mut-C,het,,,Mut-C,het,,,,,Mut-B,het,,,,
 ID-021,Line-CD,01/12/2025,ID-F12,ID-M13,End of experiment,Mut-C,hom,Mut-D,hom,,,Mut-C,het,Mut-D,hom,,,Mut-D,het,Mut-C,hom,,
 ID-022,Line-CD,01/12/2025,ID-F12,ID-M13,End of experiment,Mut-C,hom,Mut-D,hom,,,Mut-C,het,Mut-D,hom,,,Mut-D,het,Mut-C,hom,,
+ID-023,Line-DE,01/12/2025,ID-F12,ID-M13,End of experiment,Mut-D,hom,Mut-E,hom,,,Mut-D,het,,,,,Mut-E,het,,,,
+ID-024,Line-DE,01/12/2025,ID-F12,ID-M13,End of experiment,Mut-D,hom,Mut-E,hom,,,Mut-D,het,,,,,Mut-E,het,,,,