Majority of lethality is observed during embryogenesis. There are no major abnormalities in formation or identity of the trunk segments. Formation of larval head structures is abnormal but the nature of the defects is undetermined.
Suppresses the extra sex comb phenotype of Pc4, Ts(YLt;2Lt)L124. Causes between 50% and 100% suppression of the Pc4/+ extra sex combs phenotype.