FB2026_03 , released September 17, 2026
Allele: Dmel\mei-B1
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General Information
Symbol
Dmel\mei-B1
Species
D. melanogaster
Name
FlyBase ID
FBal0012181
Feature type
allele
Associated gene
mei-B
Associated Insertion(s)
Carried in Construct
Key Links
Allele class
Mutagen
    Nature of the Allele
    Allele class
    Mutagen
    Progenitor genotype
    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
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        References
        Comments on Models/Modifiers Based on Experimental Evidence ( 0 )
         
        Disease-implicated variant(s)
         
        Phenotypic Data
        Phenotypic Class
        Phenotype Manifest In
        Detailed Description
        Statement
        Reference

        The reduction in meiotic exchange seen in mei-B1 females is most severe in distal intervals.

        (Baker and Hall, 1976)

        Females homozygous for mei-B1 exhibit reduced levels of meiotic exchange (to approximately 33% of control levels). The effects of this mutation on disjunction have not been examined. However its low fertility suggests that nondisjunction may be frequent.

        External Data
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        Additional Comments
        Genetic Interactions
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        Reference
        Xenogenetic Interactions
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        Complementation and Rescue Data
        Comments
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        Mutant
        Wild-type
        Stocks (0)
        Notes on Origin
        Discoverer
        External Crossreferences and Linkouts ( 0 )
        Synonyms and Secondary IDs (1)
        Reported As
        Symbol Synonym
        mei-B1
        Name Synonyms
        Secondary FlyBase IDs
          References (1)