FB2026_03 , released September 17, 2026
Aberration: Dmel\T(1;4)FM7-A
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General Information
Symbol
T(1;4)FM7-A
Species
D. melanogaster
Name
Translocation (1;4) FM7-A
FlyBase ID
FBab0049513
Feature type
chromosomal_translocation
Computed Cytological Breakpoints (relative to progenitor)
Sequenced Breakpoints (relative to progenitor)
Member of large scale dataset(s)
Nature of Aberration
Cytological Order

4Rt-102|[h26-h27]|20F-20A|15D-20A|15D-11F4|4E1-11F2|4D7-1B3|h32-XRt; 4Lt-102|[h27-h32]|1B2-XLt

(Maggert and Kindelay, 2025)
Progenitor
In(1)FM7a
(Maggert and Kindelay, 2025)
Mutagen
Class of aberration (relative to wild type)
chromosomal_translocation
(Maggert and Kindelay, 2025)
Class of aberration (relative to progenitor)
chromosomal_translocation
(Maggert and Kindelay, 2025)
Cytological Breakpoints (relative to progenitor)

h26-h27;102;[h26-h27];[102-102];

(Maggert and Kindelay, 2025)
Causes alleles
Carries alleles
Transposon Insertions
Formalized genetic data
Genetic mapping information
Comments
Comments on Cytology
Sequence Crossreferences
DDBJ / EMBL / GenBank
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 (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.
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    Phenotypic Data
    In combination with other aberrations
    NOT in combination with other aberrations

    Homozygous viable.

    (Lattao et al., 2011)
    Stocks (6)
    Notes on Origin
    Discoverer
     

    A translocation with breakpoints in the h26 or h27 region of the FM7a variant carrying P{Tb1}FM7-A and the right tip of chromosome 4. The result is that the left tip of FM7a, including the distal In(1)sc8 1B2;20F breakpoint and the bb rDNA locus, is appended to chromosome 4 (FBrf0262931), and the distal end of FM7a is replaced by the right tip of the fourth chromosome. The fourth chromosome breakpoint occurred distal to fourth chromosome genes, so no fourth chromosome genes are appended to the distal end of FM7a.

    (Parks and Cook, 2026.8.6)
    Balancer / Genotype Variants of the Aberration
    Separable Components
    Other Comments
     

    T(1;4)FM7-A may be used the same way a typical X chromosome balancer is used for balancing X chromosomes - in fact it was used extensively as a routine X chromosome balancer before the translocation was discovered. Nevertheless, care must be exercised in using this balancer in crosses involving fourth chromosome genetic elements.

    (Parks and Cook, 2026.8.6)
    Synonyms and Secondary IDs (2)
    Reported As
    Symbol Synonym
    T(1;4)FM7-A
    (Parks and Cook, 2026.8.6)
    Name Synonyms
    Translocation (1;4) FM7-A
    Secondary FlyBase IDs
      References (4)