Open Close
General Information
D. melanogaster
Inversion (1) scute
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)



Carries alleles
Transposon Insertions
Formalized genetic data

Zhr << bk1 << l(1)sc << bk2 hits ABO-X

Genetic mapping information

Left breakpoint between DNA coordinates +24.0 and +25.8 (Campuzano et al., 1985). 0 is an arbitrarily chosen EcoRI site in the scĪ² segment of ASC; positive values to the left (Carramolino, Ruiz-Gomez, Guererro, Campuzano and Modolell, 1982, EMBO J. 1: 1185-92).

Comments on Cytology

The proximal breakpoint is in or near the ABO-X heterochromatic region that maternally interacts with the abo gene product.

Left limit of break 1 from polytene analysis (FBrf0042024) Right limit of break 1 from complementation mapping against l(1)sc (FBrf0047940) Left limit of break 2 from complementation mapping against ABO-X (FBrf0042645) Right limit of break 2 from polytene analysis (FBrf0105072)

Sequence Crossreferences
DNA sequence
Protein sequence
Gene Deletion and Duplication Data
Genes Deleted / Disrupted
Complementation Data
Completely deleted / disrupted
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
    NOT in combination with other aberrations

    In(1)sc4 causes a loss of all scutellar bristles.

    Homozygous females show a loss of tergite chaetae.

    Maternal and zygotic interactions between abo and In(1)sc4 (Malva, Labella, Manzi, Salzano, Lavorgna, De Ponti and Graziani, 1985, Genetics 111: 487-94). In(1)sc4/+ female produces about 6% exceptional males from 4-strand double exchange. Secondary exceptions about 4%.

    Stocks (2)
    Notes on Origin

    Agol, 1928.


    on a y chromosome

    Balancer / Genotype Variants of the Aberration
    Separable Components
    Other Comments
    Synonyms and Secondary IDs (4)
    Reported As
    Name Synonyms
    Inversion (1) scute
    Secondary FlyBase IDs
      References (37)