Biometrical genetics : the study of continuous variation / K. Mather.

  • Mather, Kenneth, 1911-1990.
Date:
[1949]
Catalogue details

Licence: Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)

Credit: Biometrical genetics : the study of continuous variation / K. Mather. Source: Wellcome Collection.

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    4 THE GENETICAL FOUNDATION to factor dosage, variation would be quantitative, would follow Galton's frequency curves and would be nearly continuous. Con¬ tinuity would be completed by the blurring effect of non-heritable FIG. 1 The polygenic or multiple factor theory. The distribution of phenotypes obtained in a Fg with two genes of equal and additive effect but without domin¬ ance, neglecting non-heritable variation. The phenotypic expression is propor¬ tional to the munber of capital letters in the genotype. There would be seven phenotypic classes with three such genes, nine classes with four genes, and 2n+1 classes with n genes agencies, which would of course make the phenotypic ranges of the various genotypes overlap. During the next ten years this multiple factor hypothesis, as it was called, was applied to data from a variety of organisms, not¬ ably by East and his collaborators, and by Fisher. The former