Abdominal segments A5 and A6 are transformed towards an A4 identity in homozygous males. The tergites show posterior-to-anterior transformation and hairs are seen on the sixth sternite.
gpp72A suppresses the pairing-sensitive silencing seen in flies carrying P{Mcp-ff#13}101 and P{Mcp-w#14}AP-2stummelbein in cis and weakly suppresses the pairing-sensitive silencing seen in flies carrying P{Mcp-w#11}16 and P{Mcp-w#11}102 in cis or P{Mcp-wy#2}63 and P{Mcp-ff#15}30 in cis.
Selected as: a mutation that dominantly suppresses pairing-sensitive silencing of the mini-w gene in P{Mcp-ff#10}5 or P{Fab7-w#un3}18.73.1.