Meaning of gene deletion: The loss of all or a part of a gene.
Definition of gene deletion
The loss of all or a part of a gene. There may also be a change in the RNA and protein made from that gene. Certain gene deletions are found in cancer and in other genetic diseases and abnormalities.
Written and maintained by James Murray· Last updated July 21, 2026 Educational reference, not medical advice. Read the limitations.
For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.