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XVII.—The Effect of Consanguineous Parentage upon Metrical Characters of the Offspring
Published online by Cambridge University Press: 15 September 2014
Extract
The theoretical treatment of consanguineous unions in human populations has been the subject of several publications, notably by Dahlberg (1927), by Haldane and Moshinsky (1933), and by the present writer (1933). In these attention has been directed to the concentration of discrete characters among the offspring of related parents in a community mating at random. This communication is a contribution to the more general problem of variability which can be expressed in metrical terms. Its theoretical interest resides in the fact that deductions from the genetical theory of inbreeding are open to little, if any, ambiguity, when used as an instrument for detecting gene differences whose manifestation is considerably modified by differences of environment prevailing in human societies. Two criteria will be examined. The first is the effect of consanguineous parentage upon the correlation of their offspring both when autosomal and sex-linked transmission occur. The second is the comparison of the variance of a group of individuals with consanguineous parents with that-of a group of individuals with unrelated parents taken from the same social environment. Since first cousin marriages constitute the type of relatively close inbreeding most commonly encountered in practice, the inquiry which follows is confined to the treatment of unions between first cousins.
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- Copyright © Royal Society of Edinburgh 1934
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