Data for a Mendelian Scheme of Heredity for the Headform

Abstract

We know that the high index is more or less dominant to the low and that the sum of headlength and headbreadth is hereby of importance; in some cases dolichocephaly is dominant to microbrachycephaly. There are also hereditary variations; the indices of children from parents with high indices are also high, those of children from parents with low indices low (1921 c. tab. XV p. 182, tab. 15a, p. 50; 1921 b, p. 965, 966). There is a correlation between the index of the parents and that of the children (1921a). In general we will therefore try to explain the heredity of the index on the ground of the polymery-theory, so of multiple factors with dominance.