Table I.

Precellularization Defects Are Not Enhanced in syx

		Cycles 10 and 11				Cycles 12 and 13
		No. of defective regions		No. of nuclei per region		No. of defective regions		No. of nuclei per region
p36-23		1.2 ± 1.0		1.4 ± 0.6		5.3 ± 3.1		1.7 ± 0.8
clones		n = 15				n = 20
syx L266		1.5 ± 0.9		1.9 ± 0.8		5.4 ± 3.2		2.1 ± 1.1
clones		n = 10				n = 11

Embryos were analyzed for the number of nuclei dropping away from the cortex of the syncytial blastoderm, either early in this stage (cycles 10 and 11) or late (cycles 12 and 13). The embryos were derived from females carrying germ line clones of homozygous P36-23 or syx ^L266 mated to syx ^L371/TM3 males. Nuclei were visualized with Hoechst 33258. The number of areas in which nuclei were dropping away and the number of nuclei in each area were determined and expressed as averages per embryo ± SD; n, the number of embryos examined.