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Master circadian clock gene.
iHow to read this: each row is one possible genotype, the two DNA letters you carry at this position, one inherited from each parent. "Normal" matches the more common version; "Carrier" (heterozygous) means you have one copy of each version, usually a partial effect; "Variant" (homozygous) means both copies carry the less common version, usually the strongest effect. The estimated frequency below is calculated from the variant's frequency in the general population (Hardy-Weinberg principle) — it is a population estimate, not a measurement of our own customers.
| Genotype | Impact | Est. frequency | What it means |
|---|---|---|---|
| TTNormal | Normal | ~49% | T/T: standard circadian rhythm, morning-leaning chronotype. |
| TCCarrier | Low impact | ~42% | T/C: intermediate chronotype. |
| CCVariant | Moderate | ~9% | C/C: evening chronotype tendency; alertness and strength peak later in the day, and late eating or irregular sleep affect you more. |
Estimated with the Hardy-Weinberg principle from the variant's population frequency, not measured directly.
How to get and read your raw DNA file
Upload your 23andMe or AncestryDNA file and get a personalized nutrition plan based on your exact genotype.