FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Aberration: Dmel\Df(YS)B4
Open Close
General Information
Symbol
Df(YS)B4
Species
D. melanogaster
Name
FlyBase ID
FBab0003017
Feature type
chromosomal_deletion
Also Known As
Df(Y)B4
Computed Breakpoints include

h21;h25B-h25

Features within h21--h25
Sequence coordinates
Member of large scale dataset(s)
Nature of Aberration
Cytological Order
Progenitor
Dp(1;Y)y+
(Gatti and Pimpinelli, 1983)
Mutagen
X ray
gamma ray
(Gatti and Pimpinelli, 1983)
Class of aberration (relative to wild type)
chromosomal_deletion
(FlyBase, 2007)
Class of aberration (relative to progenitor)
chromosomal_deletion
(Gatti and Pimpinelli, 1983)
Breakpoints

h20-h21;h25B-Xhy+

(Gatti and Pimpinelli, 1983)
Causes alleles
Carries alleles
Transposon Insertions
Formalized genetic data

bk1 << ks-1 << ks-2 << bk2

Genetic mapping information
Comments
Comments on Cytology

Left limit of break 1 from polytene analysis (citation unavailable) Right limit of break 1 from polytene analysis (FBrf0039037) Left limit of break 2 from polytene analysis (FBrf0039037) Right limit of break 2 from polytene analysis (citation unavailable)

Sequence Crossreferences
DDBJ / EMBL / GenBank
DNA sequence
Protein sequence
Gene Deletion and Duplication Data
Genes Deleted / Disrupted
Complementation Data
Completely deleted / disrupted
ks-1
(Gatti and Pimpinelli, 1983)
ks-2
(Gatti and Pimpinelli, 1983)
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

    Suppresses the z1 In(1)wis eye colour phenotype.

    (Rasmuson-Lestander et al., 1993)

    Heterozygotes with T(Y;2)A162, T(Y;3)H135, T(Y;3)H138, T(Y;2)H149, T(Y;2)J165, T(Y;2)P8, T(Y;2)P51, T(Y;2)R93, T(Y;2)B24, T(Y;3)D221, T(Y;3)G45, T(Y;3)G130, T(Y;2)J163, T(Y;3)R78 or T(Y;3)R119 are sterile, heterozygotes with T(Y;2)A77 or T(1;Y)V8 are fertile.

    (Gatti and Pimpinelli, 1983)
    NOT in combination with other aberrations

    Male sterile. Heterozygotes with ks-1S23 or ks-1S24 are sterile.

    (Gatti and Pimpinelli, 1983)
    Stocks (0)
    Notes on Origin
    Discoverer
     

    Recovered as male-sterile Y chromosome.

    Balancer / Genotype Variants of the Aberration
     
    Separable Components
     
    Other Comments
     
    Synonyms and Secondary IDs (2)
    Reported As
    Symbol Synonym
    Df(Y)B4
    (Rasmuson-Lestander et al., 1993, Gatti and Pimpinelli, 1983)
    Df(YS)B4
    Name Synonyms
    Secondary FlyBase IDs
      References (5)