Figure 2.—

The simplified complementation map of l(2)41Ae was drawn, as in Hilliker (1976), with each mutant strain being represented with a line. If two mutant strains were lethal in combination, then the lines representing them were drawn on the map such that they were parallel and could be joined by a perpendicular transversal. To fully complete the map, some mutant strains had to be represented by lines that ran horizontal, angled, and vertical. The molecular identity of six complementation groups, some of which were determined here, is labeled on the map.