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the claim
The additional cone in tetrachromacy corresponds to a specific distinct color wavelength
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
2 sources for · 0 against

Genetic and evolutionary studies of vertebrate vision confirm that individual cone photoreceptors and their underlying opsin proteins are tuned to respond to distinct regions of the light spectrum.

Evidence for · 2
The evolutionary history and spectral tuning of vertebrate visual opsins.
2023 · cited by 68
The study details how vertebrate visual opsins evolve spectral tuning to become sensitive to distinct wavelengths of light.
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The analysis

The retrieved papers document the spectral tuning of cone opsins and how specific opsin genes correspond to distinct wavelength sensitivities across species and human phenotypes, supporting the claim without any contradictory evidence in the provided set.

More for · 1
A two-step method for identifying photopigment opsin and <i>rhodopsin</i> gene sequences underlying human color vision phenotypes.
2020 · cited by 2
This genetic and phenotypic analysis of human color vision phenotypes identifies specific cone opsin genes (OPN1LW, OPN1MW, OPN1SW) corresponding to distinct wavelength sensitivities.
The paper trail · every fact has a biography
first checked05 Aug 2026
judged → SUPPORTED · 8605 Aug 2026
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