Dfd13/Dfd3 flies reared at 29oC reach adulthood at a rate of approximately 50% that of wild type.
Dfd3/Dfd13 transheterozygotes have reduced viability of about 50%.
Homozygous embryos exhibit truncated lateralgraten and medially split T-ribs. Heterozygotes with Dfd13 have reduced viability and adults exhibit an intermediate phenotype.
Individuals raised at the restrictive temperature during postembryonic development display failure of suboesophageal ganglion (SEG) and thoracic ganglion (TG) to separate. There is not a discrete temperature sensitive period for SEG-TG separation. Salivary glans are found located tangled in the midthorax and in the neck. Heterozygotes with Dfd9 display a range of maxillary palp defects. Mild defects shpw a decrease in the palp size, are immobile and have reduced numbers of mechanosensory bristles. Moderate defects include missing one palp and severe defects include having both palps missing.
Mouth hook material is not in wild type position: defects in structures derived from the maxillary, mandibular and premandibular regions of the embryonic head.