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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
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)