Insertion of gypsy element at nucleotide position -118.
DNA coordinates (Jack, 1985) (0 is gypsy site in ct6): 0
visible | recessive
Wings are cut to points, and the wing margins are scalloped.
Strong ct6-like wing phenotype.
ctMR2 has visible phenotype, suppressible | heat sensitive by mod(mdg4)ul
ctMR2 has phenotype, suppressible by su(Hw)unspecified/su(Hw)unspecified
ctMR2 has phenotype, suppressible by su(Hw)2
ctMR2 has phenotype, suppressible by su(Hw)u1
ctMR2 has phenotype, suppressible by su(Hw)u2
Phenotype is partially suppressed by mod(mdg4)ul at 25oC, and completely suppressed by mod(mdg4)ul at 18oC.
Highly unstable; mutates to either stable, unstable (most frequent, --> 10-4 mutations to ct), or superunstable (least frequent, --> around 50% ct mutants) alleles and to other ct alleles, which in turn may be unstable or superunstable. The gypsy sequence appears to be mobilized and transposed into other parts of the ct locus to produce new ct alleles or, when ct undergoes reversion, to other positions on the chromosomes where new mutants arise.
Other types of transposing elements also appear to be mobilized in the ctMR2 unstable system.
Unstable revertants are able to generate new ct derivatives, retain the gypsy LTR of ctMR2.
ctMR2 can revert or partially revert by excision of, or insertion of other elements (e.g. jockey or Hercules), into the gypsy insert responsible for ctMR2.
su(Hw) binding site in gypsy insertion in ct is full length.