Polytene chromosomes normal.
Nucleotide substitution: C?T.
Amino acid replacement: Q336term.
C5842550T
C?T
Q337term | vn-PA; Q337term | vn-PC
Q336term
adult cuticle & head capsule | dorsal
In homozygous mutant clones, the ocelli and ocellar bristles are deleted and the postvertical bristles, which lie near the lateral ocelli are also lost. However, most of the interocellar cuticle is retained, although occasionally limited invasion of frons into the ocellar region sometimes occurs. Occasionally irregularities in the dorsal head cuticle are seen.
Individuals transheterozygous with a vn deletion exhibit small wings.
The viability of homozygous larvae is reduced, with only 21% surviving to the third instar stage, and only 6% surviving to form pupae. Third instar homozygous larvae have no wing or haltere discs. Cells that probably represent the precursors of these discs are found in the positions where wing and haltere discs are normally found. There are numerous cavities in the brain and ventral ganglion. Homozygous vnddd-3 1st and 2nd leg discs cultured in vivo transdetermine to wing at approximately the same frequency as wild-type leg discs.
L3 larval/pupal lethal
vnddd-3 is a non-suppressor of visible phenotype of AdamTS-BKK108644, Scer\GAL4Act5C.PU
vnddd-3/vn1 has wing vein L4 phenotype, suppressible by emc1/emc11
vnddd-3 is a non-suppressor of wing vein | ectopic phenotype of AdamTS-BKK108644, Scer\GAL4Act5C.PU
The extra wing vein phenotype caused by expression of CG4096KK108644 under the control of Scer\GAL4Act5C.PU is not suppressed if the flies also carry vnddd-3.
Shearn.
Homozygous early third instar larvae can support the in vivo culture of wild-type wing discs.