Eggs from homozygous females are usually fragile and collapsed.
females produce morphologically abnormal eggs. temperature-sensitive Fertile at 16oC and 23oC. Mosaic analysis suggests that normal allele functions in somatic tissue (Wieschaus, Audit and Masson, 1981). Chorion ultrastructure normal (Komitopoulou, Gans, Margaritis, Kafatos and Masson, 1983).
Germ line clonal analysis shows that fs(1)A180 function is required in the soma.