FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term egg chamber ID (Ontology) FBbt:00004894 (Fly Anatomy)
Definition Female germline cyst that forms as the 16-cell cyst moves posteriorly through the germarium, becoming encapsulated in follicle cells (Spradling, 1993). Its formation is completed in germarium region 3, where it buds off from the germarium and progresses posteriorly along the ovariole (Spradling, 1993, Reichmann and Ephrussi, 2001).[ FlyBase:FBrf0064777 ]
Also Known As "follicle" ; "germarium derived egg chamber"
Comment
Links to External Ontologies
Annotations
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    1285
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       9
Insertions (FBti)  PHENOTYPE_MANIFEST_IN     224
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN     422
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Images Insertions Constructs
 egg chamber (all annotations which use CV term, excluding "NOT" statements)    1285    103      1    233    428
     egg chamber | absent      20       --       --       2     18
     egg chamber | absent | somatic clone - tissue specific       1       --       --       1       --
     egg chamber | adult stage       5       --       --       1      1
     egg chamber | adult stage | conditional       1       --       --       1       --
     egg chamber | anterior       3       --       --       2      1
     egg chamber | anterior | somatic clone       1       --       --       --       --
     egg chamber | calorie restriction conditional       3       --       --       1      1
     egg chamber | cell autonomous | germline clone       1       --       --       1       --
     egg chamber | cell non-autonomous | germline clone       2       --       --       --       --
     egg chamber | cell non-autonomous | somatic clone       3       --       --       1       --
     egg chamber | clone of cells       2       --       --       --       2
     egg chamber | conditional       7       --       --       --       4
     egg chamber | decreased number      27       --       --       4     19
     egg chamber | decreased number | oogenesis      10       --       --       --       9
     egg chamber | drug conditional       1       --       --       --       --
     egg chamber | germline clone     157       --       --      22      1
     egg chamber | germline clone | maternal effect       8       --       --       --       --
     egg chamber | germline clone | nutrition conditional       2       --       --       --       --
     egg chamber | germline clone | oogenesis       1       --       --       1       --
     egg chamber | germline clone | oogenesis stage S14       5       --       --       3       --
     egg chamber | germline clone | oogenesis stage S6       3       --       --       --       --
     egg chamber | germline clone | oogenesis stage S7       3       --       --       --       --
     egg chamber | germline clone | oogenesis | progressive       1       --       --       --       --
     egg chamber | germline clone | somatic clone       1       --       --       --       --
     egg chamber | heat sensitive      15       --       --       1      6
     egg chamber | increased number       3       --       --       --       4
     egg chamber | lateral       1       --       --       1       --
     egg chamber | maternal effect      15       --       --       4       --
     egg chamber | maternal effect | heat sensitive       1       --       --       --       --
     egg chamber | maternal effect | somatic clone       4       --       --       --       --
     egg chamber | nutrition conditional      22       --       --       --      14
     egg chamber | oogenesis      11       --       --       2      3
     egg chamber | oogenesis stage S10      10       --       --       3      5
     egg chamber | oogenesis stage S10 | somatic clone       3       --       --       --       --
     egg chamber | oogenesis stage S10B       5       --       --       --       6
     egg chamber | oogenesis stage S14      23       --       --       9      8
     egg chamber | oogenesis stage S5       2       --       --       --       --
     egg chamber | oogenesis stage S5 | somatic clone       1       --       --       --       --
     egg chamber | oogenesis stage S7       1       --       --       1       --
     egg chamber | oogenesis stage S8       5       --       --       1      4
     egg chamber | oogenesis stage S9       9       --       --       --       8
     egg chamber | oogenesis | somatic clone       4       --       --       1      2
     egg chamber | pharate adult stage       1       --       --       --       --
     egg chamber | somatic clone      73       --       --       8     17
     egg chamber | temperature conditional       2       --       --       --       1
Spanning Tree (Parents/Children)
Only view relationship:
germline cyst______________________
female-specific anatomical entity__|
                                   female germline cyst
                                    |__egg chamber  5501 rec.
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UBERON:0003199