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General Information
D. melanogaster
FlyBase ID
Feature type
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

bk1 << cnn << drk << bk2 << fas

Genetic mapping information
Comments on Cytology

Removes all of 50A and may delete some of the material from the 50B1-50B2 doublet.

Right limit of break 1 from inclusion of cnn (FBrf0087566) Limits of break 2 from polytene analysis (FBrf0084021)

Sequence Crossreferences
DNA sequence
Protein sequence
Gene Deletion and Duplication Data
Genes Deleted / Disrupted
Complementation Data
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
    Phenotypic Data
    In combination with other aberrations

    Fails to complement Df(2R)vg-B, complements Df(2R)vg135.

    NOT in combination with other aberrations

    Homozygotes exhibit mitotic and midgut defects. Females with germline clones lay morphologically normal eggs for 5-6 days then stop laying. Older females exhibit discontinuity in the production of late stage egg chambers and nurse cell degeneration. Among the embryos produced from cnn- oocytes three classes can be defined: early arrest of nuclear division, completion of early nuclear division before undergoing necrosis and some hatch and develop to viable adults.

    Homozygotes develop up to the end of embryogenesis but fail to hatch. Nervous system and gut show defects with respect to expression of molecular markers. The second midgut constriction fails to form. The finger-like projections of the gastric caeca also fail to extend.

    Stocks (1)
    Notes on Origin
    Balancer / Genotype Variants of the Aberration
    Separable Components
    Other Comments
    Synonyms and Secondary IDs (2)
    Reported As
    Name Synonyms
    Secondary FlyBase IDs
      References (10)