FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Aberration: Dmel\Df(1)JA21
Open Close
General Information
Symbol
Df(1)JA21
Species
D. melanogaster
Name
FlyBase ID
FBab0000462
Feature type
chromosomal_deletion
Also Known As
Df(1)JA27
Computed Breakpoints include

20A;20F

Features within 20A--20F
Sequence coordinates
Member of large scale dataset(s)
Nature of Aberration
Cytological Order
Progenitor
Mutagen
X ray
(Miklos et al., 1987)
Class of aberration (relative to wild type)
chromosomal_deletion
(FlyBase, 2007)
Class of aberration (relative to progenitor)
chromosomal_deletion
(Harbecke and Lengyel, 1995, Pauli et al., 1995, Perrimon et al., 1989)
Breakpoints

19E4;20F

(Perrimon et al., 1989)

19E5-19E6;20

(Pauli et al., 1995)

18A5;20A

(Harbecke and Lengyel, 1995)
Causes alleles
Carries alleles
Transposon Insertions
Formalized genetic data

uncl << bk1 << fog << su(f) << bk2

Genetic mapping information
Comments
Comments on Cytology

Left limit of break 1 from non-inclusion of uncl (FBrf0046783) Right limit of break 1 from inclusion of fog (FBrf0046783) Limits of break 2 from polytene analysis (FBrf0049894)

Sequence Crossreferences
DDBJ / EMBL / GenBank
DNA sequence
Protein sequence
Gene Deletion and Duplication Data
Genes Deleted / Disrupted
Genes NOT Deleted / Disrupted
Genes Duplicated
Complementation Data
Completely duplicated
Partially duplicated
Molecular Data
Completely duplicated
Partially duplicated
Genes NOT Duplicated
Complementation Data
 
Molecular Data
 
Affected Genes Inferred by Location (0)
    If no genes are listed here, it may be because the affected region is very large. The JBrowse insert above may show an error for the same reason, and other FlyBase tools such as CytoSearch may also fail for large regions. You can contact FlyBase for more help.
    In these cases, there will be no "Export to Hitlist" button to the left.
    Phenotypic Data
    In combination with other aberrations
    NOT in combination with other aberrations

    Homozygous embryos are very abnormal compared to wild-type.

    (Harbecke and Lengyel, 1995)

    Heterozygosity for this deletion has no effect on the mutant ovarian phenotype of ovoD2.

    (Pauli et al., 1995)
    Stocks (2)
    Notes on Origin
    Discoverer

    Lefevre.

     
    Balancer / Genotype Variants of the Aberration
     
    Separable Components
     
    Other Comments
     

    Designation as "Df(1)JA27" was in error.

    (Perrimon et al., 1989, Miklos et al., 1987)
    Synonyms and Secondary IDs (3)
    Reported As
    Symbol Synonym
    Df(1)JA21
    Df(1)JA27
    (Satoh et al., 2008, Harbecke and Lengyel, 1995, Perrimon et al., 1989, Miklos et al., 1987)
    DfJA27
    (Costa et al., 1994)
    Name Synonyms
    Secondary FlyBase IDs
      References (10)