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General Information
D. melanogaster
Inversion (1) yellow-3 of Patterson
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

bk1 << y << ABO-X << bk2

Genetic mapping information

The left breakpoint defines the distal limit of the y coding region. On the DNA map of Campuzano et al., 1985, this breakpoint is at +73 and on the DNA map of Biessmann, 1985, it lies between +36.5 and +38.3; in both maps, positive values are to the left of the origin.

Comments on Cytology

Breaks stated to be 1A;20, on basis of the fact that distal break falls in y and y (at that time) was thought to be in 1A.

Left limit of break 1 from polytene analysis (citation unavailable) Left limit of break 2 from polytene analysis (citation unavailable) Right limit of break 2 from polytene analysis (FBrf0042024)

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

The variegated body colour phenotype is not suppressed by Df(2R)ED3921.

Position-effect variegation of In(1)y3P is enhanced by Df(2L)E66.

NOT in combination with other aberrations

The male mating success of In(1)y3P males is statistically equivalent to controls. Adult wings and bodies show reduced pigmentation.

Variegated body colour.

Mutants are viable and have a yellow wing and body phenotype. Bristle pigmentation is normal. The humeral, anterior supraalar, presutural, anterior orbital, ocellar, postvertical, anterior notopleural, scutellar, posterior supraalar, anterior dorsocentral, posterior dorsocentral and anterior vertical bristles are present. The rows of microchaetae on the notum are present.

The position effect variegation of y caused by In(1)y3P is suppressed by a single copy of Low1.

The presence of a single copy of Mow mutation significantly increases the amount of pigment in both males and females, both MowEMS and Mowgamma suppress position effect variegation.

Position-effect variegation and effect of modifiers of variegation on expression of y in In(1)y3P chromosome studied.

Adult body tan, most bristles black, although patches of yellow bristles and hairs; larval mouth parts light at prongs. Variegation for 'Hw' phenotype less extreme than for y.

Stocks (1)
Notes on Origin

Patterson, 25th May 1931.

Balancer / Genotype Variants of the Aberration
Separable Components
Other Comments

PEV data based on acHw-1.

Synonyms and Secondary IDs (5)
Reported As
Name Synonyms
Inversion (1) yellow-3 of Patterson
Secondary FlyBase IDs
  • FBal0018624
  • FBal0018618
References (35)