FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\fwsZ1201
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General Information
Symbol
Dmel\fwsZ1201
Species
D. melanogaster
Name
FlyBase ID
FBal0284632
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Key Links
Genomic Maps

Allele class
Nature of the Allele
Allele class
Progenitor genotype
Cytology
Description

Amino acid replacement: K230term.

Mutations Mapped to the Genome
Curation Data
Type
Location
Additional Notes
References
Nucleotide change:

A17480161T

Amino acid change:

K230term | fws-PA; K230term | fws-PC; K230term | fws-PD; K230term | fws-PH; K230term | fws-PI

Reported amino acid change:

K230term

Comment:

Site of nucleotide substitution in mutant inferred by FlyBase based on reported amino acid change.

Variant Molecular Consequences
Associated Sequence Data
DNA sequence
Protein sequence
 
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

spermatid & nucleus | supernumerary

Detailed Description
Statement
Reference

A large proportion of fwsZ1201 mutant spermatids have one large nebenkern with four nuclei of normal size, indicating a cytokinetic failure in both meiotic divisions. A smaller proportion have two nuclei and a large nebenkern, indicating failure of only one of the meiotic divisions. Occasionally spermatids are seen (<4% of cases) with three nuclei, which may be due to failure of cytokinesis in the first meiotic division, followed by budding off of only one daughter cell in the second meiotic division. Additionally, a significant proportion (19%) of spermatids have more than four nuclei, which may result from defects in the mitotic divisions preceding mitosis.

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
fwsz-1201
Name Synonyms
Secondary FlyBase IDs
  • FBal0179740
  • FBal0151903
References (3)