When in combination with spl alleles of N alleles size of spl eyes slightly increases with no suppression of eye roughness.

Severe to intermediate embryonic phenotype. Lethal when heterozygous with Dl^9P, wings exhibit enlarged veins 3 and 5 and occasionally some notches can be observed in the rear wing. Heterozygotes with Dl^vi1 are lethal.

The most severe antimorphic allele (Vassin and Campos-Ortega, 1987). All components of the phenotype of heterozygosity for a Dl deletion are present in a drastically increased manner in heterozygotes for Dl^B107 (or for Dl^FE30 or Dl^FE32). All wing veins are irregularly widened, veins 3 and 5 being broadened along their whole lengths (same for vein 2 in Dl^FE30 and Dl^FE32) and are occasionally incised posteriorly; the deltas formed at the wing margins are larger and the wings are held spread with complete penetrance. The eyes are smaller and rougher. There is also a severe disturbance of the normal bristle pattern on the head, thorax and abdomen owing to a further increase in the number of bristles. The ocelli are larger and often fused together, thus forming a half circle. Finally, tarsal segments 2 to 4 are fused, but segment 5 is never found to be affected.