INDEX 



Abnormal abdomen, 242 



Abnormal distribution of X-chromo- 



somes, 90 

 Adjustment to environment, 236 

 Albino, 193 

 Alleles, allemorphs, iii, 153, 175, 181, 



2i9> 342 



Allen, E., 81 



Altenburg, E., 339 



Amblystoma, 8, 240 



Andalusian fowl, 224 



Annelid — sea urchin hybrids, 267 



Antirrhinum, 304 



Armadillo, 199 



Arrangement of genes, 142-160 



Ascaris, chromosomes, 39, 189 



Autosomal inheritance, 104-122, 129, 

 208 



Autosomes, 54; relation to sex, 62-65; 

 changing number of sets, 62-65 ; re- 

 lation to characteristics, 104-122, 

 208 ; method of distribution, 105 ; 

 many types, 122 



Axolotl, 240 



Balance, among chromosomes, 64-67, 



321 ; among genes, 191-192 

 Baltzer, P., 82, 270, 281 

 Banana-fly, 24 

 Bar-eye, 23-28, 247-249 

 Bateson, Wm., 129, 304, 314 

 Baur, E., 304, 314 

 Behavior, 254 

 Belling, J., .159, 33.8 

 Binomial distribution, 227-228 

 Biparental reproduction, 283, 307, 345 

 Birds, chromosomes, 58; gynandro- 



morphs, 78 ; sex-linked inheritance, 



96 

 Blakeslee, A. F., 319, 321, 339 

 Blending inheritance, 223, 225 

 Bobbed, 217 

 Bonellia, 79, 82 

 Boveri, T., 189 

 Breakage of chromosomes, 326-333; 



effect on genes, 333-336; relation to 



mutation, 333-335, 361 



367 



Bridges, C. B., 20, 22, 35, 59, 62, 63, 



81, 163, 242, 265 

 Bristle characters, Drosophila, 100, 



181, 217 

 Bursa, 205, 222 

 Butterfly hybrids, 275 



Castle, W. E., 205, 281 



Cattle, sex ratio, 76 



Characteristics or characters, defini- 

 tion, 179; relation to X-chromo- 

 somes, 83-103; list of those depend- 

 ent on X, 98-101 ; sex-linked, 

 83-103; relation to autosomes, 104- 

 122; to Y-chromosomes, 122-129; 

 dependent on two pairs of auto- 

 somes, 114-H9; dependent on three 

 or more pairs, 119-121 ; three meth- 

 ods of distribution, 129; wild-type, 

 165; linkage groups, 165-177; con- 

 nection with chromosomes, 175-177 ; 

 relation to genes, 179-205; affected 

 by many genes, 182-185 ; same char- 

 acter from different genes, 186; 

 kinds affected by genes, 195; in 

 man, 196-204; intermediate, 223; 

 relation to environment, 232-265; 

 affected both by genes and by en- 

 vironment, 241-252; recombina- 

 tions, 286-299, 301-307; transforma- 

 tions, 301-314; new, 301, 304 



Chlorophyll, relation to genes and en- 

 vironment, 244 



Chromomeres, 159 



Chromosomes, 8 ; division, 9 ; num- 

 ber, 10, 38, 325, 337; reduction, 11; 

 function, 12; removal, 13; substi- 

 tution, 13, 22, 34; male and female 

 groups, 14, 19, 20; sex differences, 

 14-X8 ; relation of those of parents 

 to those of offspring, 21 ; in ferti- 

 lized egg, 38 ; in somatic cell divi- 

 sions, 41 ; between cell divisions, 

 41-43; vesicles, 42; reappearance, 

 44; activity in development, 42, 67, 

 177; conjugation, 48; synapsis, 48; 

 combinations, 51-53; exchange of 



