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SUMMARY Incidence of colourblindness among 1501 (945 males and 656 females) persons belonging to four nomadic Mendelian isolates, the Nandiwallas of Maharashtra, India, has been reported.
Out of the four groups, three lacked the gene for colourblindness, while in one group the incidence was rather low (0·3 per cent). Our findings support the differential selection hypothesis
for this loci of Post (1962) and Pickford (1963). 110 families with 334 children were examined for the inheritance of this trait. All matings except one were of the type normal × normal and
produced all normal children; the one family of the type father colourblind × normal mother, also had all the six children with normal colour vision. The implications of the loss of the
colourblind gene has been discussed in the light of nomadic way of the Nandiwallas, and also of their small effective population sizes. SIMILAR CONTENT BEING VIEWED BY OTHERS A LARGE AND
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Google Scholar Download references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Indian Statistical Institute, Calcutta, c/o Deccan College, Poona, 6, India K C Malhotra * B.J. Medical
College, Poona G S Mutalik & S L Kate * Deccan College, Poona, 6 B V Bhanu & P M Fulmali Authors * K C Malhotra View author publications You can also search for this author inPubMed
Google Scholar * G S Mutalik View author publications You can also search for this author inPubMed Google Scholar * B V Bhanu View author publications You can also search for this author
inPubMed Google Scholar * S L Kate View author publications You can also search for this author inPubMed Google Scholar * P M Fulmali View author publications You can also search for this
author inPubMed Google Scholar RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Malhotra, K., Mutalik, G., Bhanu, B. _et al._ Incidence of colourblindness
among four endogamous nomadic groups: an example of natural selection. _Heredity_ 32, 145–149 (1974). https://doi.org/10.1038/hdy.1974.17 Download citation * Received: 02 March 1973 * Issue
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