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The Incidence of Inherited Defects of Colour Vision in Madhya Pradesh, India

Published online by Cambridge University Press:  01 August 2014

P. C. Dutta  and
G. D. Kumar
P. C. Dutta
Affiliation:
Anthropological Survey of India, Indian Museum, Calcutta
G. D. Kumar
Affiliation:
Anthropological Survey of India, Indian Museum, Calcutta

Summary

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1. Sex-linked type of defective colour vision among 608 unrelated students, including 251 males and 357 females belonging to different communities residing in Madhya Pradesh of India, was investigated. Males were found to have 3.19% defective colour vision; again, of the defectives the deutans were found to be exactly three times greater than the protans. Significantly, none of the females was colourblind.

2. Brahmin of Madhya Pradesh displayed a comparatively low value of abnormal incidence being 2.88% among the other Brahmin samples. The occurrence of green-blind was found to be a little more than double of the red-blind in the sample, χ2 test for significance in respect of the total incidence of colour-blindness in various samples of Brahmin shows no heterogeneity (P>0.05). But, when certain Brahmin samples having a common origin are combined, some significant differences are brought out showing a clear statistical heterogeneity (P<0.02).

Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 15 , Issue 4 , September 1966 , pp. 364 - 370
Copyright
Copyright © The International Society for Twin Studies 1966

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