Trait
Total colorblindness
Clinical name: Monochromacy
Complete color blindness, a complete inability to distinguish colors. Affected persons cannot perceive colors, but only shades of gray.
Summary
- Also called
- Complete achromatopsia
- Body system
- Abnormality of the eye
Reference genomeGRCh38hg38
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Get my Genome Test8 genes linked to Total colorblindness
Changes in these genes cause rare conditions in which Total colorblindness is seen. Most people with this trait have none of those conditions, and a gene on this list says nothing about anyone's own genome.
| Gene | How often it is seen | Conditions |
|---|---|---|
| ATF6activating transcription factor 6 | Very often (80–99%) | In 1 condition |
| CNGA3cyclic nucleotide gated channel subunit alpha 3 | Very often (80–99%) | In 1 condition |
| CNGB3cyclic nucleotide gated channel subunit beta 3 | Very often (80–99%) | In 2 conditions |
| GNAT2G protein subunit alpha transducin 2 | Very often (80–99%) | In 1 condition |
| PDE6Cphosphodiesterase 6C | Very often (80–99%) | In 1 condition |
| PDE6Hphosphodiesterase 6H | Very often (80–99%) | In 1 condition |
| RPGRretinitis pigmentosa GTPase regulator | Very often (80–99%) | In 1 condition |
| CNNM4cyclin and CBS domain divalent metal cation transport mediator 4 | Not recorded | In 1 condition |
How often is among people with one of the gene's conditions, the most often across them, as the Human Phenotype Ontology records it. These pages describe traits and the research behind them; they are not a diagnosis, and a doctor or genetic counsellor is the person to ask about symptoms.
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Where this comes from
- The Human Phenotype Ontology, release 2026-09-01: the trait, its names, its definition and the genes linked to it. Find out more at hpo.jax.org.
- Data release 2026.10.16-c6eea6bf.
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