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The Application Of An Index To Determine Genetic And Environhental Contributions To Dentofacial Growth In Twins And Siblings, Richard Charles Hayes
The Application Of An Index To Determine Genetic And Environhental Contributions To Dentofacial Growth In Twins And Siblings, Richard Charles Hayes
Theses and Dissertations
The method of principal components may be used to reduce a large quantity of data for an individual into a single statistic, a growth index, indicative of overall facial growth, and to make a determination of the relative contribution of each variable, as well as the genotype and the environment, to the variation between individuals, When this method is applied to four consecutive years of cephalometric and anthropometric data from each of 95 children, consisting of Caucasian and Negro monozygotic twins, like-sexed dizygotic twins, and their siblings of both sexes, it discloses that:
1. The relative contributions of the variables …