Table 1.

Embryos with defects in dorsal closure

	No./total no. (%)
+/+ × msn102/+	1/143 (0.7)
+/+ × bsk1/+	1/108 (0.9)
bsk1/+ × msn102/+	15/137 (10.9)
bsk2/+ × msn102/+	20/198 (10.1)
flp147/+ × msn102/+	39/388 (10.1)
hep1/+ × msn102/+	31/88  (35.2)
hepr75/+ × msn103/+	22/61  (36.0)

Embryos were collected and aged for 24 hr. Cuticles were prepared from unhatched embryos, and the number of embryos with an aberrant dorsal cuticle was determined. The total number of hatched and unhatched embryos was determined by resuspending all of the larvae and embryos in Hoyer’s solution and counting under a microscope.