Complementation, 39 

 Complexity, increase in, 275, 276 

 Components of variance {see Variance) 

 Compositae, 185 

 Computers, digital, 302, 303 

 Confirmation, 290 

 Continuous variation, 52 

 Convergence, 270, 271 

 and parallelism in cultural evolution, 

 290 

 Cope's rule, 274 

 Correlation coefficient, product-moment, 



303-305 

 Cotton, 46 

 Crepis, 185, 202, 204 

 foetida, 186 

 fuliginosa, 185 

 kotschyana, 186 

 neglecta, 185 

 runcinata, 202 

 Crickets, 186 

 Crocodiles, 260, 263 

 Cross-veinless phenotype in Drosophilu, 



156 

 Crossing-over, 32, 35, 38, 40, 41, 43, 46, 

 49, 175 

 somatic, 168 

 Crotalidae, 265 

 Crow, J. F., 123 

 Cruciferae, 147 

 Cuckoos, 229, 245-247 



gentes in, 229, 245-247 

 Culex, 31 

 Cultural bias and evolutionary theory, 296- 



298 

 Cultuxal diversity, 287 

 Cultural evolution, 290, 295 



convergence and parallelism in, 290 

 {See also Evolution) 

 Cultural integration and genetic 



homeostasis, 291 

 Culture, 281,285-292 

 Curculionidae, 204 

 Cyanophycophyta, 166 

 Cybernetics, 60 

 Cyclical parthenogenesis and sequence of 



generations, 205, 206 

 CycUcal thelytoky, 200 

 Cyclosia hestinioides, 271, 273 

 Cyperaceae, 266 

 Cytoplasm, 24-27 

 33o I Cytoplasmic inheritance, 26, 165 



Dactylis glomerata, 146 

 Darfington, C. D., 68, 183-185, 207 

 Danvin, 211, 224, 291, 301, 308 

 Darwin's finches (Geospizinae), 224, 243, 



245, 265, 310 

 Datura, 180 



Dawn redwood, 252, 259 

 Day Uly, 74, 196 

 Decay of variabihty, 98-101 

 Deletions, chromosomal, 47, 48 

 Dendrograms, 304-306 

 Deoxyribonucleic acid, 14-19, 27, 44, 57, 



64, 161-164, 167, 170 

 Dermatobia hominis, 84 

 De Robertis, 29, 30, 33, 34, 43 

 Development, 42, 166, 167 

 Developmental homeostasis, 57-61, 66, 



166, 167, 171 

 De Vries, 182 

 Diatoms, 167 



Dicentric chromatid, 49, 176 

 Dichromena, 266 

 Dictatorships, 290, 291 

 Diiferential segment of chromosomes, 47, 



178 

 Differentiation, cellular, 62-65 

 Dikaryosis, 168, 169 

 Diplococcus, 161 

 Diploidy, 45, 165-170, 184 

 Diplophase, 61 

 Diplospory, 199-201 

 Diptera, 49, 187 



Directed alternate disjunction, 178, 182 

 Directional selection, 104, 127 

 Discordant variation, 252 

 Disease and pollution of environment, 289 

 Disjunction, 34, 50 

 Dispersal, 79, 80, 172 

 Disruptive selection, 104, 147, 148, 248 

 Dissemination, 83 

 Distribution, 75-79 

 ecological, 76, 79, 84 

 geographic, 75, 76 

 of individuals, 79, 80 

 DNA {see Deoxyribonucleic acid) 

 Dobzhansky, T., 16, 55, 139-145, 159, 218, 

 235, 236, 249, 293, 298, 309, 312, 314 

 Domestication, 238 

 Dominance, 39, 45, 103, 104, 130 



ecological, 276 

 Dominance component of variance, 53 

 Dominance-recessiveness, 45 



