Semidominant. In homozygous condition reduces the incidence of agametic par/par females from 95-100% to 51-61% and abdominal defects from 26-49% to 5-14%. No effect on fecundity at 29oC or the frequency of cephalic defects caused by par. par/par Su(par)+/Su(par) females are 77% agametic. Su(par) homozygotes in the absence of par are normal.
In the homozygous condition reduces the frequency of agametic flies from 95-100% to 51-61% and that of abdominal defects from 26-49% to 5-14% in the progeny of parX1122 females. Has no effect on the fecundity at 29oC or the frequency of thoracic or cephalic defects caused by parX1122. parX1122/parX1122 Su(par)+/Su(par)1 flies are 77% agametic. Su(par)1 homozygotes are indistinguishable from wild-type in the absence of parX1122.