38 (230) DOMINANCE. REVERSED DOMINANCE RECESSIVENESS OF 
further family 73b with 8 children, family 179c with 7 children, family 
269b with 3 children and family 356c with 2 children. Of the incomplete 
families, family 7 is probably also such an example. 
As regards the question whether the headsize has any value for the _ 
dominance, in my opinion, we may conclude that the dominant high 
(brachycephalic) index often belongs to a large head, and the recessive 
high index to a small head. | 
_ Where when treating the cases of table VI, we already remarked 
that in many families the indices of children grouped themselves in 
most cases round the parent with the high index, in some other ones 
round the parent with the low index, this phenomenon agrees with the 
result of the research of the tables VIT and VIII. 
The fact, too, that of the families of table IV the deviating high 
index is often that of a small head is in agreement with the result of 
table VIII, namely the recessiveness of this high index. 
When dominance of brachycephaly, (which much oftener occurs 
than reversed dominance) is a fact, then it must also be obvious from 
a statistical elaboration of the material. Brachycephalic parents and 
dolichocephalic ones may be hereditary variations. In these cases the 
children of brachycephalic parents as well as those of dolichocephalic 
ones will show a non- hereditary variability in which the variability - 
of the children of the brachycephalic parents — as we may accept — 
will not differ from that of the children with dolichocephalic parents. 
__ If however brachycephaly is dominant over dolichocephaly, brachy- 
cephalic parents can be not purely hereditary, i. e. according to the 
mendelian interpretation heterozygous. In marriages of these parents 
(DR x DR) or of parents of whom one is a homozygote and the other 
a heterozygote (DD x DR) there will be born many heterozygous 
children and these are in a high grade variable. This must then become 
obvious from a statistical elaboration. In this question the result will 
be hindered through the cases of reversed dominance. | 
The tables XII and XIII (p.176) which give a view of the indices Of the 
children of brachycephalic parents, respectively dolichocephalic ones, 
have been composed in the following way. For a further investigation 
all parents have been grouped into tables in which the parents are 
macrobrachycephalic x macrobrachycephalic, microbrachycephalic x 
microbrachycephalic, macrobrachycephalic x microbrachycephalic, 
etc These lists have been used. So from table XII f. i. we see that there 


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