Colour Vision of Heterozygotes for Sex-linked Red-Green Defects

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SEX-LINKED red-green colour vision defects are incompletely recessive, since the heterozygotes for these defects and the normal condition usually have small red-green defects1–3, or may occasionally manifest the major defects themselves4. Details of the relationships between the different defective allelomorphs5 and the small defects of these heterozygotes have not been fully revealed ; but the appended table shows the most marked characteristics of the red-green vision of seventy-three women (not major defectives) who have relatives with major defects, classified according to the defects of those relatives.

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    Pickford, R. W., Nature, 153, 409 (1944).

  2. 2

    Pickford, R. W., Nature, 159, 606 (1947).

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    de Vries, Hl., Genetica, 24, 199 (1948).

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    Ford, E. B., "Genetics for Medical Students", 151 (1946).

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    Pickford, R. W., Nature, 162, 684 (1948).

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    Pickford, R. W., Nature, 153, 656 (1944).

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    Pickford, R. W., J. Psychol., 27, 153 (1949).

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PICKFORD, R. Colour Vision of Heterozygotes for Sex-linked Red-Green Defects. Nature 163, 804–805 (1949) doi:10.1038/163804a0

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