FB2025_01 , released February 20, 2025
Aberration: Dmel\Df(1)f257-6
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General Information
Symbol
Df(1)f257-6
Species
D. melanogaster
Name
Deficiency (1) forked
FlyBase ID
FBab0000810
Feature type
chromosomal_deletion
Computed Breakpoints include

15F1;16A7

Features within 15F1--16A7
Sequence coordinates
Member of large scale dataset(s)
Nature of Aberration
Cytological Order
Progenitor
Dp(1;1)Bar
(Sutton, 1943)
Mutagen
spontaneous
(Sutton, 1943)
Class of aberration (relative to wild type)
chromosomal_deletion
(FlyBase, 2007)
Class of aberration (relative to progenitor)
chromosomal_deletion
(Sutton, 1943)
Breakpoints

15F1-15F2;16A7

(Sutton, 1943)
Causes alleles
Carries alleles
Transposon Insertions
Formalized genetic data

bk1 << B << bk2

Genetic mapping information
Comments
Comments on Cytology

Deletes the first repeat of the 16A region.

(Sutton, 1943)

Left limit of break 1 from polytene analysis (FBrf0005979) Right limit of break 1 from polytene analysis (citation unavailable) Limits of break 2 from polytene analysis (FBrf0005979)

Sequence Crossreferences
DDBJ / EMBL / GenBank
DNA sequence
Protein sequence
Gene Deletion and Duplication Data
Genes Deleted / Disrupted
Complementation Data
Completely deleted / disrupted
Bar
(Sutton, 1943)
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.
    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

    Eyes are wild type. Lethal in homozygous and hemizygous condition.

    (Sutton, 1943)

    lethal cell lethal

    Stocks (0)
    Notes on Origin
    Discoverer

    Bridges, 1917.

    (Sutton, 1943)
     
    Balancer / Genotype Variants of the Aberration
     
    Separable Components
     
    Other Comments
     

    Identity of Df(1)f257-6 with the Bridges f B deficiency claimed in Bridges and Brehme (1942), but this does not seem well established. Bridges's case was the first recorded deficiency; in 1925, it was claimed to be lost. Df(1)f257-6 obtained by Demerec from Pasadena in 1933 as a f B deficiency.

    Synonyms and Secondary IDs (4)
    Reported As
    Symbol Synonym
    Df(1)f257-6
    Df(1)f257-6
    Df(1)fB-257-6
    (Sutton, 1943)
    Name Synonyms
    Deficiency (1) forked
    Secondary FlyBase IDs
      References (5)