FB2026_02 , released June 18, 2026
Aberration: Dmel\Dp(1;f)122
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General Information
Symbol
Dp(1;f)122
Species
D. melanogaster
Name
FlyBase ID
FBab0003299
Feature type
free_duplication
Computed Breakpoints include

1E4-1F1;20E1-h26

Features within 20E1--1Rt
Sequence coordinates
Member of large scale dataset(s)
Nature of Aberration
Cytological Order
Progenitor
Mutagen
X ray
Class of aberration (relative to wild type)
free_duplication
(FlyBase, 2007)
Class of aberration (relative to progenitor)
free_duplication
Breakpoints
Causes alleles
Carries alleles
Transposon Insertions
Formalized genetic data

sc << bk1 << su(f) << bk2 << bb

Genetic mapping information
Comments
Comments on Cytology

Limits of break 1 from polytene analysis (citation unavailable) Left limit of break 2 from inclusion of su(f) (citation unavailable) Right limit of break 2 from non-inclusion of bb (citation unavailable)

Sequence Crossreferences
DDBJ / EMBL / GenBank
DNA sequence
Protein sequence
Gene Deletion and Duplication Data
Genes Deleted / Disrupted
Complementation Data
Completely deleted / disrupted
Partially deleted / disrupted
Molecular Data
Completely deleted
Partially deleted
Genes NOT Deleted / Disrupted
Complementation Data
 
Molecular Data
 
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.
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    Phenotypic Data
    In combination with other aberrations

    In(1)dl-49/+/Dp(1;f)122 show nondisjunction of normal X from In(1)dl-49

    NOT in combination with other aberrations

    The rDNA content of the bb+ and bb duplications in attached X bb+/Dp(1;f)122bb+ and attached X bb+/Dp(1;f)122bb females is the typical rDNA content of the duplications. The rDNA content increases in attached X NO-/Dp(1;f)122bb+ and attached X NO-/Dp(1;f)122bb females or X/Dp(1;f)122bb+ and X/Dp(1;f)122bb males (NO, nucleolus organiser). This suggests that the duplications should carry a cr+ locus adjacent to the rDNA; the rDNA content of the males does not support this model.

    (la Volpe et al., 1984)

    Disjoins regularly from XY, shows 6% nondisjunction from C(1)RM and causes 9%

    Stocks (1)
    Notes on Origin
    Discoverer

    Weltman, 1954.

     

    deletion of most of X euchromatin

    Balancer / Genotype Variants of the Aberration
     
    Separable Components
     
    Other Comments
     
    Synonyms and Secondary IDs (1)
    Reported As
    Symbol Synonym
    Dp(1;f)122
    (Nelson et al., 2023)
    Name Synonyms
    Secondary FlyBase IDs
      References (7)