Embryos exhibit a weak ventralised phenotype, loss of cephalopharyngeal structures, filzkorper are fused and slight expansion of the ventral denticle belts in the anterior abdominal segments.

Weak ventralised phenotype. Defective movements of the germ band: due to loss of the amnioserosa and because the dorsalmost cells have acquired the lateral fate of the dorsal ectoderm. Dorsal cell fates are deleted and ventrolateral mitotic domains are expanded.

Weak ventralisation of the embryonic pattern.

Head broad.

weak allele