Break lies in the iab-4 transcription unit.
Lesion mapped to: 78.5-82 kb.
Defective in gonad assembly.
Sometimes form ovaries. The ovary-oviduct junctions are abnormal and egg transfer from the ovary to the uterus is blocked in the adults. Often only one mature testis with sperm is found in the males.
Partial transformation of the second adult abdominal segment to the fourth or third.
R.H. Baker.
R. Baker.
Induced with: iab-445.
Mutations in iab-4 have effects on the abd-A transcription unit, so such mutations are considered to be simultaneously mutant for iab-4 and abd-A.