FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

trinucleotide_repeat_expansion

ID (Ontology)

SO:0002165 (Sequence Ontology)

Definition

A short tandem repeat expansion with an increase in a sequence of three nucleotide units repeated in tandem compared to a reference sequence.

Also Known As

"trinucleotide repeat expansion"

Comment

Links to External Ontologies

SO.org

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)

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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	Alleles
trinucleotide_repeat_expansion (all annotations which use CV term, excluding "NOT" statements)

Spanning Tree (Parents/Children)

  short_tandem_repeat_change
   |__short_tandem_repeat_expansion
       |__trinucleotide_repeat_expansion  254 rec.

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	short_tandem_repeat_expansion
Part of
Synonyms & Secondary IDs
Synonyms
	"trinucleotide repeat expansion" EXACT
Secondary IDs

External Crossreferences & Linkouts