FB2026_02 , released June 18, 2026
FB2026_02 , released June 18, 2026
CV Term Report
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General Information
Term FBbt:00005286 ID (Ontology) FBbt:00005286 (Fly Anatomy)
Definition Male germ cells of the 16-cell cyst from the end of the S-phase that precedes meiosis I to the end of meiosis I. This S-phase occurs very early in the 16-cell cyst stage so almost all 16 cell cysts are at the primary spermatocyte stage.[ FlyBase:FBrf0064778 ]
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Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN      35
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      14
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       9
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      11
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
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Relevant FlyBase reports
 Alleles Genes  Insertions Constructs
 FBbt:00005286 (all annotations which use CV term, excluding "NOT" statements)      35     82      4     23     26
     FBbt:00005286 | FBcv:0000061       2       --       --       --       3
     FBbt:00005286 | FBcv:0000333       2       --       --       --       --
     FBbt:00005286 | FBdv:00007001       1       --       --       1       --
     FBbt:00005286 | GO:0007283       3       --       --       1      2
Spanning Tree (Parents/Children)
Only view relationship: 
FBbt:00005258
 |__FBbt:00004936__
 |__FBbt:00004938__|
FBbt:00057011      |
 |__FBbt:00004936__|
                   FBbt:00005286  191 rec.
                    |__FBbt:00057145 12 rec.
                    |   |__FBbt:00057146 4 rec.
                    |   |__FBbt:00057147
                    |   |__FBbt:00057148 3 rec.
                    |   |__FBbt:00057149 4 rec.
                    |__FBbt:00057167 18 rec.
                    |__FBbt:00057168
                    |__FBbt:00057169 7 rec.
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Is a spermatocyte
Part of primary spermatocyte cyst
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