FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term onion stage spermatid ID (Ontology) FBbt:00004945 (Fly Anatomy)
Definition A round spermatid containing a spherical Nebenkern with an onion-like arrangement of mitochondrial material. The axoneme begins to grow out from the basal body inserted at the base of the nucleus and the Golgi complexes have fused to form the acroblast and acrosomal granule located at the apical side of the nucleus, opposite the basal body. There is a prominent protein body in the nucleus.[ FlyBase:FBrf0064778 ]
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 Alleles Genes Insertions Constructs
 onion stage spermatid (all annotations which use CV term, excluding "NOT" statements)
     onion stage spermatid | absent
      --       --
     onion stage spermatid | heat sensitive
      --       --       --
     onion stage spermatid | progressive
      --       --       --
     onion stage spermatid | spermatogenesis
      --       --       --
     onion stage spermatid | third instar larval stage
      --       --       --
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spermatid cyst
male germline cell__
                    spermatid cyst
                     |__spermatid
                         |__onion stage spermatid  136 rec.
                    spermatid(+) 1126 rec.
                     |__onion stage spermatid  136 rec.
                         |__Nebenkern 5 rec.
                             |__Nebenkern 5 rec.
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Is a spermatid
Develops from clew stage spermatid
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