A DNA sequence difference compared with a reference sequence.
Start here, then move into the molecular detail when the relationship feels clear.
Genetics foundation 03
What is a genetic variant?
A genetic variant is a difference in DNA sequence relative to a reference. The difference itself is a fact; its meaning depends on gene, transcript, frequency, evidence, and review context.
Educational and research use only. Not a clinical interpretation.Genetic variantDNA → gene → variant
Put the idea in context.
A genetic variant is a difference in DNA sequence relative to a reference. The difference itself is a fact; its meaning depends on gene, transcript, frequency, evidence, and review context.
Keep the reference frame visible.
ACMG/AMP and ClinGen frameworks organize multiple evidence types. Population frequency, computational predictions, functional studies, segregation, case observations, and expert review each have strengths and limits.