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General Information
D. melanogaster
FlyBase ID
Feature type
Also Known As
Computed Breakpoints include
Sequence coordinates
Member of large scale dataset(s)
Nature of Aberration
Cytological Order
Class of aberration (relative to wild type)
Class of aberration (relative to progenitor)
Causes alleles
Carries alleles
Transposon Insertions
Formalized genetic data

l(1)20Cb << bk1 << sph << bb << bk2 << l(1)carot3

Genetic mapping information
Comments on Cytology

Complementation with stnA and l(1)20Ca not tested.

Left limit of break 1 from non-inclusion of l(1)20Cb (FBrf0042290) Right limit of break 1 from polytene analysis (citation unavailable) Left limit of break 2 from inclusion of ABO-X (FBrf0076047) Right limit of break 2 from polytene analysis (citation unavailable)

Sequence Crossreferences
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
    Phenotypic Data
    In combination with other aberrations

    Fertile when in combination with Dp(1;Y)BSYy+, weakly fertile in combination with Dp(1;Y)y+mal126 and sterile in combination with Dp(1;Y)mal+.

    Heterozygotes with Dp(1;Y)BSYy+ are fertile, weakly fertile with Dp(1;Y)y+mal126 and sterile with Dp(1;Y)y+mal+.

    NOT in combination with other aberrations

    Causes inviability or low viability in hybrid females when heterozygous with D.simulans chromosome.

    Stocks (2)
    Notes on Origin


    Balancer / Genotype Variants of the Aberration
    Separable Components
    Other Comments
    Synonyms and Secondary IDs (3)
    Reported As
    Name Synonyms
    Secondary FlyBase IDs
      References (9)