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Reading of Ishihara (1959) Plates 14 and 15: A new X‐linked recessive colour vision anomaly?
Author(s) -
DRONAMRAJU K. R.
Publication year - 1963
Publication title -
annals of human genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.537
H-Index - 77
eISSN - 1469-1809
pISSN - 0003-4800
DOI - 10.1111/j.1469-1809.1963.tb00204.x
Subject(s) - pedigree chart , blindness , reading (process) , anomaly (physics) , test (biology) , genetics , optometry , biology , psychology , medicine , gene , physics , philosophy , linguistics , condensed matter physics , paleontology
SUMMARY Frequency data on 577 males and 608 females from Orissa, India are presented which suggest that the ability to read Plates 14 and 15 of Ishihara (1959) test is determined by a group of X ‐linked recessive genes. Five out of the six pedigrees investigated are compatible with the hypothesis. The frequency among males is 34.3% and among females 6‐4%. The frequency of colour blindness (in the usual sense) is 4–6 % among males and 0.16 % among females. I am grateful to Prof. J. B. S. Haldane, F.R.S. for helpful suggestions and guidance. Messrs M. R. Shastry and P. Srihari Rao assisted in the work.