FB2026_02 , released June 18, 2026
Aberration: Dmel\In(1LR)l-v139
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General Information
Symbol
In(1LR)l-v139
Species
D. melanogaster
Name
Inversion (1LR) lethal-variegated
FlyBase ID
FBab0004317
Feature type
chromosomal_inversion
Computed Breakpoints include

3C5;h33-h34

Sequence coordinates
Member of large scale dataset(s)
Nature of Aberration
Cytological Order
Progenitor
Mutagen
X ray
(Lindsley et al., 1960)
Class of aberration (relative to wild type)
chromosomal_inversion
(FlyBase, 2007)
Class of aberration (relative to progenitor)
chromosomal_inversion
(Lindsley et al., 1960)
Breakpoints

3C5-3C7;h33-h34

(Lindsley et al., 1960)
Causes alleles
Carries alleles
Transposon Insertions
Formalized genetic data

bk1 hits rst << vt << bk2

Genetic mapping information
Comments
Comments on Cytology

Left limit of break 1 from polytene analysis (FBrf0013319) Right limit of break 1 from complementation mapping against rst (FBrf0013319) Limits of break 2 from polytene analysis (FBrf0013319)

Sequence Crossreferences
DDBJ / EMBL / GenBank
DNA sequence
Protein sequence
Gene Deletion and Duplication Data
Genes Deleted / Disrupted
Complementation Data
Completely deleted / disrupted
rst
(Lindsley et al., 1960)
w
(Lindsley et al., 1960)
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

    X/0 and X/Y males are lethal (relative viability of 0). Levels of maternal nondisjunction are low. Chromosome requires 2 Y chromosomes to survive. These males are characterised by w variegation and a phenotype similar to rst2. Males are fertile.

    (Lindsley et al., 1960)

    requires two Y chromosomes for survival X0 male lethal XY male lethal XYY male viable XYY male fertile

    Stocks (0)
    Notes on Origin
    Discoverer

    Lindsley, Edington and Von Halle.

     
    Balancer / Genotype Variants of the Aberration
     
    Separable Components
     
    Other Comments
     

    Shows position-effect variegation for an unidentified l(1).

    Synonyms and Secondary IDs (5)
    Reported As
    Symbol Synonym
    In(1)l-v139
    In(1LR)l-v139
    Inp(1)139
    (Lindsley et al., 1960)
    l(1)v139
    Name Synonyms
    Inversion (1LR) lethal-variegated
    Secondary FlyBase IDs
    • FBal0007900
    References (4)