Letter | Published:

Sex Differences in Colour Vision

Nature volume 159, pages 606607 (03 May 1947) | Download Citation



IN a previous communication1, it was shown that women with known colour-blind relatives were significantly more often red-green weak to a slight extent than women taken at random. This carried the implication that red-green blindness must be an incompletely recessive Mendelian character (although sex-linked), because a large proportion of the women with known colour-blind relatives must be heterozygous for that defect. Several later experiments have confirmed that conclusion, essentially the same results .being obtained with each new group tested.

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    , Nature, 153, 409 (1944).

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    , and , Nature, 152, 690 (1943).

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    , Brit. J. Psych., 37, 33 (1946).

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    , Nature, 157, 376 (1946).

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  1. Psychology Department, University, Glasgow.

    • R. W. PICKFORD


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