




MICROBRACHYCEPHALY. PREFOTENCE. (237) 45 
No. ace ip Children. 
arents. rents. 
ree 
VIII 
10b A 84 | 79 | 80 | 80 | 78 | 76 
je PIN BD LI 16176 1126.26 
28 81 | 83 | 81 | 80 | 79 
32c 7.221.291 BA ar 79:1:8051.28%.78:1 271 76 
19e 74 | 83 | 78 | 80 | 79 | 78 | 77 | 77 | 77 |75 
269b | 81 TINTS 187. AL Zoen 791,79 
IX 
324g | 83 | 78 | 81 | 77 | 78 | 83 | 75 | 78 | 84 | 86 
319b 78 | 82 | 78 | 82 | 82 | 86 
193 82 77 | 85 | 86 









These cases, where the indices of children, surpass those of parents in 
a high degree, cannot, as we concluded (p. 15), be interpreted by the 
polymery-theory. Therefore we speak here of prepotence. 
Consequently selection is possible through combination of factors 
according to the polymery-theory and through prepotence. Now we 
shall still pursue one of the properties of this first form of selection for 
our material. 
Is there a connection between hereditary constitution and varla- 
bility? Not a direct one; experience must learn, if there is such a 
connection. It is very well possible, that homozygous forms possess 
a large non-hereditary variability. 
PEARSON (1901) in his publication on homotyposis says (p. 286): "I 
have often been impressed with the small reduction in variability 
which can be produced by selection. The offspring of a single parent 
_ while diverging in character possibly very widely from the average 
character of the race, will still have a variability in that character only 
slightly reduced, say at most 10 %, below the racial variability.” This 
is also said by GALTON (cf. FRETS 1921 p. 5). And PEARSON (p. 36) 
”,...no ground for asserting that increased intensity of heredity 
FA 
SS 
Zst: Nu mode 

