FB2026_02 , released June 18, 2026
Aberration: Dmel\Tp(2;Y)cb25-4
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General Information
Symbol
Tp(2;Y)cb25-4
Species
D. melanogaster
Name
FlyBase ID
FBab0009924
Feature type
interchromosomal_transposition
Computed Breakpoints include

41A-h38;h44;h1-h17

Sequence coordinates
Member of large scale dataset(s)
Nature of Aberration
Cytological Order
Progenitor
T(Y;2)cb25
(Lyttle, 1989, Ault and Lyttle, 1988)
Mutagen
gamma ray
(Lyttle, 1989, Ault and Lyttle, 1988)
Class of aberration (relative to wild type)
interchromosomal_transposition
Class of aberration (relative to progenitor)
chromosomal_transposition
(Temin, 1991, Lyttle, 1989)
Breakpoints

41-2Rt;h39-h46;h1-h17

(Temin, 1991)

h38;h44

(McKee et al., 1993)
Causes alleles
Carries alleles
Transposon Insertions
Formalized genetic data

bk1 hits Rsp << uex << bk2 << RpL38

Genetic mapping information
Comments
Comments on Cytology

Resealing that consists essentially of an entire Y chromosome with 2R heterochromatin inserted into its long arm.

(Ault and Lyttle, 1988)

Left limit of break 1 from polytene analysis (FBrf0054143) Right limit of break 1 from polytene analysis (FBrf0057923) Left limit of break 2 from inclusion of uex (FBrf0049925) Right limit of break 2 from polytene analysis (FBrf0049925) Left limit of break 3 from polytene analysis (FBrf0049925) Right limit of break 3 from polytene analysis (FBrf0054143)

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

    Male fertility restored.

    (Lyttle, 1989)
    Stocks (0)
    Notes on Origin
    Discoverer
     
    Balancer / Genotype Variants of the Aberration
     
    Separable Components
    Other Comments
     

    Elevated frequencies of prophase associations between second and Y chromosomes occur in proportion to the region of homology between the second and Y chromosomes. Transposition heterozygotes exhibit preferential Y-2 segregation, also in proportion to the region of homology between the second and Y chromosomes. Thus males have a general homology pairing system despite their lack of recombination.

    (McKee et al., 1993)
    Synonyms and Secondary IDs (3)
    Reported As
    Symbol Synonym
    T(Y;2) CB25-4
    (Ault and Lyttle, 1988)
    Tp(2;Y)CB25-4
    (Lyttle, 1989)
    Tp(2;Y)cb25-4
    Name Synonyms
    Secondary FlyBase IDs
      References (5)