FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\ordys91
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General Information
Symbol
Dmel\ordys91
Species
D. melanogaster
Name
FlyBase ID
FBal0154805
Feature type
allele
Associated gene
Dmel\ord
Associated Insertion(s)
P{}ordys91
Carried in Construct
Key Links
Allele class

amorphic allele - genetic evidence

Mutagen
    Nature of the Allele
    Allele class

    amorphic allele - genetic evidence

    (Hirai et al., 2004)
    Mutagen
    Progenitor genotype
    Associated Insertion(s)
    P{}ordys91
    Cytology
    Description
    Mutations Mapped to the Genome
    Curation Data
    Type
    Location
    Additional Notes
    References
    Variant Molecular Consequences
    Associated Sequence Data
    DDBJ / EMBL / GenBank
    DNA sequence
    Protein sequence
     
    UniProtKB/Swiss-Prot
      UniProtKB/TrEMBL
        Expression Data
        Reporter Expression
        Additional Information
        Statement
        Reference
         
        Marker for
        Reflects expression of
        Reporter construct used in assay
        Human Disease Associations
        Disease Ontology (DO) Annotations
        Models Based on Experimental Evidence ( 0 )
        Disease
        Evidence
        References
        Modifiers Based on Experimental Evidence ( 0 )
        Disease
        Interaction
        References
        Comments on Models/Modifiers Based on Experimental Evidence ( 0 )
         
        Disease-implicated variant(s)
         
        Phenotypic Data
        Phenotypic Class
        Phenotype Manifest In

        meiosis & nuclear chromosome | male

        (Hirai et al., 2004)
        Detailed Description
        Statement
        Reference

        Homozygous males show severely reduced fertility. ordys91/ord1 males show 26.2% non-disjunction between the X and Y chromosomes. Homozygous XY males show a high frequency of non-disjunction of the sex chromosomes (36.9%) and fourth chromosomes (68.0%). ordys91/Df(2R)bw-S46 XY males show a high frequency of non-disjunction of the sex chromosomes (37.4%) and fourth chromosomes (64.6%). Precocious separation of sister chromatids is seen for all chromosomes in the primary spermatocytes of homozygous males. Homozygous females mated to wild-type males lay a large number of eggs which are morphologically normal, but only about 5% of the eggs hatch and only 57.7% of the eggs develop beyond the syncytial blastoderm stage. X chromosome nondisjunction in homozygous females is about 40.0%.

        (Hirai et al., 2004)
        External Data
        Interactions
        Show genetic interaction network for Enhancers & Suppressors
        Phenotypic Class
        Phenotype Manifest In
        Additional Comments
        Genetic Interactions
        Statement
        Reference
        Xenogenetic Interactions
        Statement
        Reference
        Complementation and Rescue Data
        Comments
        Images (0)
        Mutant
        Wild-type
        Stocks (0)
        Notes on Origin
        Discoverer
        External Crossreferences and Linkouts ( 0 )
        Synonyms and Secondary IDs (2)
        Reported As
        Symbol Synonym
        mei(2)ys91
        (Hirai et al., 2004)
        ordys91
        Name Synonyms
        Secondary FlyBase IDs
          References (1)