Polytene chromosomes normal.
6.9kb insertion (identity unknown) very close to the site of the hobo insertion in HB8.
macrochaeta & head
macrochaeta & scutum
H2 heterozygous adults display loss of one or more thoracic sensory bristles, as compared o controls.
H2 heterozygotes show a partial loss of wing vein L5
The wings of H2/+ mutant adults are significantly larger than those of wild type flies.
H2 wings are larger than wild type.
Homozygous intestinal stem cell clones lose self-renewing capacity over time, and fail to form large clones at 14 days after clone induction, in contrast to wild-type controls.
36% of H2 heterozygous mutant flies display shortened L2 and L4 longitudinal wing veins.
Heterozygotes show a weak suppression of notum macrochaetae and an essentially normal pattern of microchaetae.
Homozygotes lack most sensory organs and wing veins. Heterozygotes lack a few sensory organs and the distal part of wing vein L5.
Dorsal mitotic clone in the wing reduces vein differentiation in wing vein LV.
Loss of neuron mutant.
Lethal phase is at the transition from 1st to 2nd instar, and larval development preceding lethality is slightly delayed. Heteroallelic combinations with other alleles can allow development of pharate adults, therefore this allele is not considered as a strong allele, as was previously published (Bang et al., Development 111:89-104 ).
Bristle double socket phenotype.
Recessive phenotypic effects. Bristle loss on head and notum and double socket phenotype.
Haplo-insufficient.
Terminal gaps in LIV and LV and occasionally short terminal gaps in LII and LIII.
H2 has visible | adult stage phenotype, enhanceable by Sirt1[+]/Sirt12A-7-11
H2 has visible | adult stage phenotype, enhanceable by Sirt12A-7-11/Sirt12A-7-11
H2 has abnormal size phenotype, enhanceable by Df(3R)Exel9019/+
H2 has abnormal size phenotype, enhanceable by +/Df(3L)Exel9001
H2 has abnormal size phenotype, non-enhanceable by Df(2L)BSC251/+
H2 has abnormal size phenotype, non-enhanceable by Df(2R)BSC651/+
H2 has abnormal size phenotype, non-enhanceable by Df(2R)BSC274/+
H2 has abnormal size phenotype, non-enhanceable by Df(2L)Exel6005/+
H2 has abnormal size phenotype, non-enhanceable by Df(2L)BSC255/+
H2 has abnormal size phenotype, non-enhanceable by Df(2L)BSC184/+
H2 has abnormal size phenotype, non-enhanceable by Df(2L)Exel8034/+
H2 has abnormal size phenotype, non-enhanceable by Df(2R)BSC337/+
H2 has abnormal size phenotype, non-enhanceable by Df(3R)Exel6179/+
H2 has abnormal size phenotype, non-enhanceable by Df(2R)BSC660/+
H2 has abnormal size phenotype, non-enhanceable by Df(2R)BSC668/+
H2 has abnormal size phenotype, non-enhanceable by Df(2R)ED2076/+
H2 has abnormal size phenotype, non-enhanceable by Df(3L)BSC773/+
H2 has abnormal size phenotype, non-enhanceable by Df(2L)BSC226/+
H2 has abnormal size phenotype, non-enhanceable by Df(1)BSC535/+
H2 has abnormal size phenotype, non-enhanceable by Df(3R)Exel6212/+
H2 has abnormal size phenotype, non-enhanceable by +/Df(2R)Exel7123
H2 has abnormal size phenotype, non-enhanceable by Df(2L)Exel6028/+
H2 has abnormal size phenotype, suppressible by Df(2L)BSC200/+
H2 has abnormal size phenotype, suppressible by Df(1)Exel6233/+
H2 has abnormal size phenotype, suppressible by Df(1)Exel6251/+
H2 has abnormal size phenotype, suppressible by Df(1)BSC352/+
H2 has abnormal size phenotype, suppressible by Df(1)BSC870/+
H2 has abnormal size phenotype, non-suppressible by Df(2R)BSC337/+
H2 has abnormal size phenotype, non-suppressible by Df(3R)Exel6179/+
H2 has abnormal size phenotype, non-suppressible by Df(2R)BSC660/+
H2 has abnormal size phenotype, non-suppressible by Df(2R)BSC668/+
H2 has abnormal size phenotype, non-suppressible by Df(2R)ED2076/+
H2 has abnormal size phenotype, non-suppressible by Df(3L)BSC773/+
H2 has abnormal size phenotype, non-suppressible by Df(2L)BSC226/+
H2 has abnormal size phenotype, non-suppressible by Df(1)BSC535/+
H2 has abnormal size phenotype, non-suppressible by Df(3R)Exel6212/+
H2 has abnormal size phenotype, non-suppressible by +/Df(2R)Exel7123
H2 has abnormal size phenotype, non-suppressible by Df(2L)Exel6028/+
H2 has abnormal size phenotype, non-suppressible by Df(2L)BSC251/+
H2 has abnormal size phenotype, non-suppressible by Df(2R)BSC651/+
H2 has abnormal size phenotype, non-suppressible by Df(2R)BSC274/+
H2 has abnormal size phenotype, non-suppressible by Df(2L)Exel6005/+
H2 has abnormal size phenotype, non-suppressible by Df(2L)BSC255/+
H2 has abnormal size phenotype, non-suppressible by Df(2L)BSC184/+
H2 has abnormal size phenotype, non-suppressible by Df(2L)Exel8034/+
H2 is a non-enhancer of visible phenotype of upd1GMR.PB
H2 is a suppressor of visible phenotype of Scer\GAL4455.2, l(1)scUAS.cHa
H2 is a suppressor of FlyBase_internaltransgene_features:cell lethal:cell lethal | somatic clone phenotype of Delta9P
H2 is a non-suppressor of visible phenotype of upd1GMR.PB
H2 has mechanosensory chaeta | adult stage phenotype, enhanceable by Rbfox1RNAi.UAS/Scer\GAL4sca-109-68
H2 has wing vein L5 phenotype, enhanceable by Sirt1[+]/Sirt12A-7-11
H2 has wing vein L5 phenotype, enhanceable by Sirt12A-7-11/Sirt12A-7-11
H2 has macrochaeta phenotype, enhanceable by Eps-15EP2513/Eps-152
H2 has eo sensory structure phenotype, enhanceable by Eps-15EP2513/Eps-152
H2 has phenotype, enhanceable by Su(H)+t6.0
H2 has wing vein L2 phenotype, suppressible by Past1[+]/Past160-4
H2 has wing vein L4 phenotype, suppressible by Past1[+]/Past160-4
H2 has wing vein L4 phenotype, suppressible by Snr1E1
H2 has sense organ phenotype, suppressible by kuzk01405
H2 is a non-enhancer of eye phenotype of upd1GMR.PB
H2/H[+] is a suppressor of macrochaeta | ectopic phenotype of edslH8/ed1X5
H2/H[+] is a suppressor of macrochaeta | ectopic phenotype of amosTft
H2 is a suppressor of scutellar bristle phenotype of E(spl)m4-BFMUAS.cAa, Scer\GAL4ptc-559.1
H2/H[+] is a suppressor of phenotype of Hsc70-4195
H2 is a suppressor of scutellar bristle phenotype of Scer\GAL4455.2, l(1)scUAS.cHa
H2 is a suppressor of eye | somatic clone phenotype of Delta9P
H2 is a suppressor of presumptive embryonic/larval central nervous system phenotype of Delta9P
H2 is a suppressor of eye | somatic clone phenotype of neur11
H2 is a non-suppressor of eye phenotype of upd1GMR.PB
H2/H[+] is a non-suppressor of microchaeta phenotype of edslH8/ed1X5
H2, Rbfox1RNAi.UAS, Scer\GAL4sca-109-68 has tormogen cell | adult stage phenotype
H2 heterozygous adults also expressing Rbfox1dsRNA.Scer\UAS under the control of Scer\GAL4sca-109-68 exhibit an enhanced loss of thoracic sensory bristles and exhibit a significant amount of sockets instead of bristles, as compared to H2 heterozygotes.
The shortening of the wing vein L5 observed H2 heterozygous adults is partially rescued by combination with one or (more strongly) two copies of Sirt12A-7-11.
A Eps-152/Eps-15EP2513 transheterozygous background significantly enhances the hair loss phenotype observed in H2 heterozygotes. This enhancement is gene dosage dependent with loss of both copies of Eps-15 increasing the hair loss to 46%, accompanied by increases of nearly four-fold in the number of double sockets and nearly two-fold in the number of areas with no external sensory organs.
Su(H)1 heterozygosity suppresses the hair loss phenotype found in Eps-152/Eps-15EP2513; H2/+ mutants.
Effects on wing development by dx24/Y and H2/+ are mutually levelled. dx24/Y wing phenotypes, both regarding vein broadening and spread out wings, as well as haploinsufficient vein shortening in H2 mutants are largely restored in dx24/Y, H2/+ flies. Yet the fragile wing texture typical of dx mutants remains.
The presence of H2 suppresses the supernumerary phenotype seen in flies with m4Scer\UAS.cAa driven by Scer\GAL4ptc-559.1.
Mutation suppresses the ectopic scutellar bristle phenotype seen from Scer\GAL4455.2-mediated expression of l(1)scScer\UAS.cHa.
Phenotype can be suppressed by Su(H)8, alleviated by introduction of P{Su(H)+6.0} into H2 Su(H)8 flies and enhanced by a copy of P{Su(H)+6.0} introduced into heterozygotes.
Sturtevant.
Strong H allele.
Heteroallelic combinations with other alleles can allow development of pharate adults, therefore this allele is not considered as a strong allele, as was previously published (Bang et al., Development 111:89-104 ). Phenotypic series of H alleles, progressing from strongest (amorphic) to weakest mutant phenotype: HB79 = H81 >> H1 = H99 > Hbob > H94a > H88d > HB8 > H2 >= H3 > HA120.