osa2/+ enhances the telomeric position effect (TPE) of P{hsp26-pt-T}39C-5, P{hsp26-pt-T}39C-27 and P{hsp26-pt-T}39C-31. osa2/+ has no effect on the telomeric position effect (TPE) of P{wA}4-4.
osa1/osa2 embryos (lacking zygotic osa function) die late in embryogenesis with no clear defects in segmentation or segment identity. Embryos derived from homozygous female germline clones without paternal rescue (lacking both maternal and zygotic osa function) do not differentiate any cuticle. Embryos derived from homozygous female germline clones with paternal rescue (lacking maternal osa function) secrete cuticle but have severe defects in segmentation, resembling gap gene mutants.
osa2/osa[+] is a suppressor of increased cell death phenotype of DrefUAS.cSa, Scer\GAL4GMR.PS
osa2 is a suppressor of lethal phenotype of Ras85DV12.sev, sevS11.Tag:MYC
osa2 is a non-suppressor of visible phenotype of MycUAS.cZa, Scer\GAL4GMR.PF
osa2 is a non-suppressor of visible phenotype of BEAF-32UAS.cYa, Scer\GAL4GMR.PS
γTub23CPl-2, osa2 has visible | dominant phenotype
Ras85DV12.sev, osa2, sevS11.Tag:MYC has viable phenotype
osa2 has wing phenotype, enhanceable by Df(2R)ED3921/+
osa2/osa[+] is an enhancer of chaeta | increased number phenotype of gcmPyx
osa2, osa[+], brm[+], brm2 is an enhancer of chaeta | increased number phenotype of gcmPyx
osa2/osa[+] is an enhancer of adult abdominal segment 4 | ectopic phenotype of E(z)Trm
osa2/osa[+] is an enhancer of adult abdominal segment 5 phenotype of E(z)Trm
osa2/osa[+] is an enhancer of adult mesothoracic segment | ectopic phenotype of E(z)Trm
osa2/osa[+] is an enhancer of adult prothoracic segment phenotype of E(z)Trm
osa2/osa[+] is a non-enhancer of triple row of wing sensilla phenotype of ctK
osa2 is a non-enhancer of eye phenotype of BEAF-32UAS.cYa, Scer\GAL4GMR.PS
osa2/osa[+] is a suppressor | partially of eye phenotype of DrefUAS.cSa, Scer\GAL4GMR.PS
osa2/osa[+] is a suppressor of eye phenotype of Scer\GAL4ey.PH, asf1UAS.cMa
osa2/osa[+] is a suppressor of adult mesothoracic segment | ectopic phenotype of E(z)Trm
osa2/osa[+] is a suppressor of adult metathoracic segment phenotype of E(z)Trm
osa2/osa[+] is a suppressor of eye phenotype of DrefUAS.cSa, Scer\GAL4GMR.PS
osa2 is a non-suppressor of eye phenotype of MycUAS.cZa, Scer\GAL4GMR.PF
osa2/osa[+] is a non-suppressor of triple row of wing sensilla phenotype of ctK
osa2 is a non-suppressor of eye phenotype of BEAF-32UAS.cYa, Scer\GAL4GMR.PS
Flies heterozygous for osa2 show suppression of the Scer\GAL4GMR.PS, DrefScer\UAS.cSa severe rough eye phenotype; eyes are modestly rough and fused ommatidia are not apparent.
γTub23CPl-2 results in a held-out wing phenotype in double heterozygous combination with osa2 (39% penetrance).
The held out wing phenotype is enhanced from 2% penetrance in osa2/+ single mutants to 65% in Df(2R)ED3921/+; osa2/+ flies and 100% in Df(2R)ED3921; osa2/+ flies. The wing vein phenotype of Df(2R)ED3921 single mutants is enhanced by osa2, resulting in loss of L5 up to the posterior crossvein. The osa2 mutation causes an 87% suppression of the AntpNs homeotic transformation.
osa2/+ suppresses the rough eye phenotype due to Scer\GAL4ey.PH; asf1Scer\UAS.cMa.
An osa2/+ background significantly suppresses the rough eye phenotype found in flies expressing DrefScer\UAS.cSa under the control of Scer\GAL4GMR.PS.
Enhances the phenotype of E2fGMR.PD DpGMR.PD BacA\p35GMR.PH flies.
brm2 osa2 double heterozygotes have held-out wings in 97% of cases, a phenotype which is rarely seen in either single heterozygote. Antp73b/+ flies show transformation of antenna to leg. This phenotype is not suppressed by one copy of osa2. AntpNs/+ flies show transformation of antenna to leg. This phenotype is significantly suppressed by one copy of osa2. Expression of Antphs.PHTA during the larval stages results in antenna to leg transformations. This phenotype is not affected if the animals are also carrying osa2.
The lethality caused by sevS11.T:Hsap\MYC in combination with Ras85DV12.sev is suppressed by osa2.