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Summary A large sample of families drawn from the general population was found to contain an unexpectedly large number of all‐male sibships. This did not seem to be compatible with the hypothesis that sex is always determined by chance, but was in accord with the finding of an earlier study...
Book reviewed in this article: La Progénèse: Facteurs Préconceptionnels du Développerynent de l'Enfant. Biomathematics. The Principles of Mathematics for Students of Biological Science. Statistics and Mathematics in Biology. Edited by O. Kempthorne, T. A. Bancroft, J. W. Gowen and J. L. Lush. Ames,
Summary Frequency distributions of total ridge‐count are given for a population sample of 825 males and 825 females. The mean ridge‐count for males is 144·98 (σ= 51·079), for females 127·23 (σ= 52·507). The difference between these means is highly significant by the t test. The distributions are...
Summary Japanese data on half‐sibs, twins, full sibs and consanguineous matings are consistent with the hypothesis that the resemblance in birth weight of sibs is largely attributable to the maternal constitution or environment, not to genetic similarity of sibs. The following intraclass...
Summary Frequencies are given of A1A2BO, MNS, Rh, P, Lutheran, Hunter and Henshaw blood groups among Dinka, Nuer, Shilluk and Mabaan, of Upper Nile Province, Sudan. The Mabaan appear to be distinct from the three Northern Nilotic peoples who, the results indicate, are genetically similar to each...
Summary For Japanese, English, Brazilian and Austrian populations, estimates of genetic isolate size based on different types of consanguineous marriage range over more than one order of magnitude, being much greater for uncle‐niece and aunt‐nephew marriage than for first‐cousin marriage, with...
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