Index 



379 



germplasm theory, 127, 130 

 hereditary and environmental 



variations, 75 



on differential division of chro- 

 mosomes, 145, 204 

 inheritance of acquired charac- 

 ters, 238 



nuclear control of differentia- 

 tion, 204 



reduction of chromosomes 157 

 WENRICH, chromosomes of Phryno- 



tettix, 152 

 What is Life?, 6 



WHITMAN, behavior of CLEPSINE, 51 

 NECTURUS, 51 

 pigeons, 51, 52 

 freedom and choice, 52, 53 

 sex of pigeons, 169 



WHITNEY, induction effects of alco- 

 hol, 246 

 sex determination in Rotifers, 



1 66 



WIEMAN, chromosomes of man, 163 

 WIESNER, plasomes, 129 

 WILDER, Duplicate twins and double 



monsters, 229 

 WILL, 50-53 



absolutely free, 320, 331 



denned, 331 



good and evil, 320 



inherited, 71, 334 



nature, expression of, 319 



responsibility and, 331 



supreme faculty, 333 



training of, 333 

 WILSON, cell division, 18, 19 



distribution of factors, 180 



of chromosomes, 181 



dwarf and double Amphioxus 

 embryo, 222 



fertilization of sea-urchin, 12 



on sex determination, 159, 161 

 WINIWARTER, on chromosomes of 

 man, 162 



oocytes of rabbit, 750 

 WOLFF, "Theoria Generationis," 58 

 WOLTERECK, induction effects of, 246 



preinduction, 246 



Women's Colleges, influence on mar- 

 riage, 309 

 WOODS, "Heredity in Royalty," 71 



X-rays, influence on spermatozoa, 218 

 X and Y chromosomes, 170, 184 



Yolk influence on size of egg, 10 



ZELENY AND MATTOON, Selection in 



Drosophila, 269 

 Zygote, 10 



