FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term oogenesis stage S9 ID (Ontology) FBdv:00005269 (Fly Development)
Definition Oogenesis stage that begins when the border cells begin to migrate. During this stage: the oocyte is about 1/3 the length of the egg chamber with its nucleus located antero-dorsally; follicle cell migration results in an anterior to posterior gradient of follicle cell thickness with posterior cells being thicker (-> columnar) and posterior cells thinner ( -> squamous); border cell migration begins and ends; secretion of vitelline membrane begins.[ FlyBase:FBrf0021038 FlyBase:FBrf0034074 FlyBase:FBrf0064777 ]
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Data Class Field Records
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION     126
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 Alleles Genes Insertions Constructs
 oogenesis stage S9 (all annotations which use CV term, excluding "NOT" statements)       --     241    126     31
     abnormal cell migration | oogenesis stage S9       5       --       --       3
     abnormal cell migration | oogenesis stage S9 | somatic clone       3       --       --       --
     border follicle cell | oogenesis stage S9       5       --       --       3
     border follicle cell | oogenesis stage S9 | somatic clone       3       --       2       --
     egg chamber | oogenesis stage S9       9       --       --       8
     filamentous actin | oogenesis stage S9       7       --       --       4
     increased cell death | germline clone | oogenesis stage S9       1       --       --       --
     nurse cell ring canal | oogenesis stage S9       1       --       --       --
     nurse cell | germline clone | oogenesis stage S9       1       --       --       --
     nurse cell | oogenesis stage S9       2       --       --       2
     oocyte nucleus | germline clone | oogenesis stage S9       2       --       --       --
     oocyte nucleus | oogenesis stage S9       3       --       --       1
     oocyte | oogenesis stage S9      10       --       3       --
     oocyte | oogenesis stage S9 | heat sensitive       1       --       --       1
     oocyte | oogenesis stage S9 | somatic clone       1       --       --       --
     ring canal | oogenesis stage S9       2       --       --       2
Spanning Tree (Parents/Children)
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  developmental stage
   |__oogenesis stage S9  398 rec.
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Is a developmental stage
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