Deletion within hzg; results in the expressed protein containing only the N-terminal 91 amino acid residues of the wild-type protein.
hzgC91 homozygous females lay fewer eggs, despite of no obvious ovary phenotypes. Progeny from hzgC91 homozygous males and females are embryonic lethal; progeny from hzgC91 homozygous females and wild-type males is semi-viable; progeny from hzgC91 homozygous males and wild-type females is viable. The progeny from hzgC91 homozygous males and females lack denticles and show visible defects in germband retraction, head involution, and dorsal closure, in the absence of gross patterning defects.