Inheritance in Human Dizygotic Twinning

Abstract
THIS paper is concerned with the question of whether the father plays any part in the occurrence of twins among his children. Stern1 has pointed out that "the genetic interpretation of typical dizygotic twinning is complicated by the astonishing results of several studies which indicate that the disposition towards dizygotic twinning is also found in males." In one of these studies2 the rate of twinning was so high that one may conclude that many singleton births were not counted; and the apparent effect of the father on twinning can therefore be regarded as due to a bias that resulted in . . .

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