Study of Taste Sensitivity of Phenylthiocarbamide and Colour Blindness

An organic compound called Phenylthiourea could divide people into two classes, “Tasters” and “Non-tasters” irrespective of age, sex and race was done by A.L. Fox in 1932. Fox 1932, Harris and Kalmus (1951), Das (1956) showed that dominance of taster gene “T” is incomplete with the failure of its penetrance in the heterozygotes to a certain percentage. A study of taste sensitivity of P.T.C. and colourblindness among the Jats of district Rohtak, Harayana was done. The t gene frequency was found to be 0.46 in the total population and that of colourblindness was 3.11% among the males. The results have been compared with the populations of Northern India region of India. The trait of colour blindness among the populations of Northern India region has been looked into, in view of the selection relaxation hypothesis

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