Abstract
CIRCADIAN rhythms1–3 have not yet been investigated in twins. The mathematical methods used in one-phase examinations of twins—variance analysis4,5, cross-twin analysis or intra-subject correlation—are not suitable for expressing the concordance or discordance of a certain biological phenomenon in time between the individuals of separate twin pairs. We have therefore tried to devise a method of our own, suitable both for the basal physiological research of medical genetics, and for the study of biological rhythms, for example, in human biometeorology.
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BARCAL, R., SOVA, J., KRIZANOVSKA, M. et al. Genetic Background of Circadian Rhythms. Nature 220, 1128–1131 (1968). https://doi.org/10.1038/2201128a0
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DOI: https://doi.org/10.1038/2201128a0
