FB2026_02 , released June 18, 2026
Allele: Dmel\ctJC20
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General Information
Symbol
Dmel\ctJC20
Species
D. melanogaster
Name
FlyBase ID
FBal0001999
Feature type
allele
Associated gene
Dmel\ct
Associated Insertion(s)
Carried in Construct
Also Known As
Df(1)ctJC20
Key Links
Allele class
Mutagen
Nature of the Allele
Allele class
Mutagen
X ray
(Johnson and Judd, 1979)
Progenitor genotype
Cytology

Polytene chromosomes normal.

Description

Deletion of the wing margin enhancer.

(Morcillo et al., 1996)

DNA coordinates (FBrf0042060) (0 is gypsy site in ct6): A molecular deletion beginning between coordinates -1.7 and +1.0 and extending to the left beyond -60, the extent DNA coordinates: of the cloned region. Deletes material of both kinked-femur and cut-wing regions of the complex.

Mutations Mapped to the Genome
Curation Data
Type
Location
Additional Notes
References
Variant Molecular Consequences
Associated Sequence Data
DDBJ / EMBL / GenBank
DNA sequence
Protein sequence
 
UniProtKB/Swiss-Prot
    UniProtKB/TrEMBL
      Expression Data
      Reporter Expression
      Additional Information
      Statement
      Reference
       
      Marker for
      Reflects expression of
      Reporter construct used in assay
      Human Disease Associations
      Disease Ontology (DO) Annotations
      Models Based on Experimental Evidence ( 0 )
      Disease
      Evidence
      References
      Modifiers Based on Experimental Evidence ( 0 )
      Disease
      Interaction
      References
      Comments on Models/Modifiers Based on Experimental Evidence ( 0 )
       
      Disease-implicated variant(s)
       
      Phenotypic Data
      Phenotypic Class
      Phenotype Manifest In
      Detailed Description
      Statement
      Reference

      Semi-lethal. Scalloped and unexpanded wings. Vibrissae are missing. Kinked femurs. Df(1)R19/ctJC20 females have normal viability and fertility, about 20% have a kinked femur-like phenotype.

      (Johnson and Judd, 1979)

      kinked femur cut wings deformed antennae displaced or missing vibrissae fine bristles

      External Data
      Interactions
      Show genetic interaction network for Enhancers & Suppressors
      Phenotypic Class
      Phenotype Manifest In
      Additional Comments
      Genetic Interactions
      Statement
      Reference
      Xenogenetic Interactions
      Statement
      Reference
      Complementation and Rescue Data
      Comments
      Images (0)
      Mutant
      Wild-type
      Stocks (0)
      Notes on Origin
      Discoverer

      Lefevre.

      Comments
      Comments

      ctJC20 is associated with an inhibition of recombination within the ct locus.

      (Johnson and Judd, 1979)
      External Crossreferences and Linkouts ( 0 )
      Synonyms and Secondary IDs (2)
      Reported As
      Symbol Synonym
      Df(1)ctJC20
      (Tchurikov et al., 1989, Tchurikov et al., 1988)
      ctJC20
      Name Synonyms
      Secondary FlyBase IDs
        References (6)