FB2026_02 , released June 18, 2026

CV Term Report

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General Information

Term

male sex differentiation

ID (Ontology)

GO:0046661 (Gene Ontology)

Definition

The establishment of the sex of a male organism by physical differentiation.

Comment

Links to External Ontologies

QuickGO data AmiGO data

Annotations

Records annotated with this term OR any of its CHILD TERMS

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Direct annotations: records annotated with this exact term (child terms are NOT included)

Data Class	Field	Direct annotations
Genes (FBgn)	GO_BIOLOGICAL_PROCESS

Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records

Full annotation statements	Relevant FlyBase reports
Full annotation statements	Genes
male sex differentiation (all annotations which use CV term, excluding "NOT" statements)
involved_in \| male sex differentiation

Spanning Tree (Parents/Children)

developmental process involved in reproduction
 |__sex differentiation_________________
multicellular organismal process        |
 |__multicellular organism development__|
anatomical structure development        |
 |__multicellular organism development__|
                                        male sex differentiation  33 rec.
                                         |__development of animal secondary male sexual characteristics
                                         |__development of primary male sexual characteristics 9 rec.
                                         |   |__male gonad development(+) 9 rec.
                                         |__male anatomical structure morphogenesis 19 rec.
                                         |   |__male genitalia morphogenesis(+) 19 rec.
                                         |   |__nematode male tail tip morphogenesis(+)
                                         |__male genitalia development 23 rec.
                                         |   |__male genitalia morphogenesis(+) 19 rec.
                                         |__male pigmentation 2 rec.
                                         |   |__regulation of male pigmentation(+) 1 rec.
                                         |__Mullerian duct regression

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	sex differentiation
Part of	multicellular organism development
Synonyms & Secondary IDs
Synonyms

Secondary IDs

External Crossreferences & Linkouts