An Examination of the Effect of Monozygotic Twinning upon the Distribution of Gender in Families
It seems reasonable to assume that the gender (boy or girl) of all babies born would be determined as if by tossing a fair coin, and therefore that the distribution of the number of sons in families of a given size would be binomial. However, it is well known that this is not the case. Such deviations from the binomial distribution can be attributed to several possible factors, one of which is twinning. In this poster presentation the effect of twinning will be examined.