Deletion within hzg; results in the expressed protein containing only the N-terminal 69 amino acid residues of the wild-type protein.
hzgP69 homozygous females lay fewer eggs, despite of no obvious ovary phenotypes. Progeny from hzgP69 homozygous males and females are embryonic lethal; progeny from either hzgP69 homozygous females and wild-type males or hzgP69 homozygous males and wild-type females are viable. The embryo progeny from hzgP69 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.