374 



PHYSIOLOGICAL GENETICS 



Pattern, development, 178, 200-201, 

 205, 208, 210, 243, 261 

 gradient, 48 

 growth, 210, 262 



localisation. 245, '-'IS 



unit ant genes, 25 I 

 pigment, 193, L96, 258-259 



zebra, 2<>1 



Teas, rogues in, 291 

 Pelargonium sonale, 98, 169 

 Penetrance, 66, 69, 71 



Petunia, critical period for, 22 



Pharbitw Nil, maple alleles, 86 



Phenocopy, 4, 9-11, 14, 16, 18, 22- 

 23, 26, 40, 44-46, 49, 58, 66, 83, 

 102, 106, 128, 196, 215, 235, 238, 

 243, 253 



Phenogenetics, 23 



Pheomelanin, 34-35 



Physcomitrella, 153 



Phylogeny, 311 



Pholiota mutabilis, 268 



Pigmentation, chemical models, 92 



Pigment cells in newts, 179 



Plasmon, 56, 275-276 



Plastids, 269, 281 



Platypoecilus, 44, 260 



Pleiotropy, 78, 115 



Plymouth Rock feathers, 219, 261 



Pollen fertility, 279 



Pollen sterility, 274, 280 



Polydactyly in guinea pigs, asym- 

 metry, 226 



Polymorphism, nielanic, 250 



Polyploidy, 152, 153, 169, 213 



Position effect, 109, 138, 292, 297, 

 300, 302, 304, 306, 308-309, 312 



Potato beetle, color varieties of, 91 



Potencies of genes, 285 



Poultry, extra toes in, 226 



Presence-absence, 123 



Primula sinensis, 80, 98, 187 



Promethea moth, 228 



Proteinase, 315 



Prothetely, 173 



Protosome, 297 



Psammechinus, 267 



Psychid moths, L53 



Pterylae, development of, 259, 261 



B 



Rabbit, 54, 86, 91, 155, 160-161, 



258 

 Kai, 19, 225, 258 



Rate, of growth and hormones in 

 leathers, 219 



of segmentation, 208 

 Hate concept, 51 

 Rate genes, 52, 155 

 Reactions within the cells, 174 

 Rearrangements, spontaneous, 312 

 Rodents, 108, 157, 160 



colors of the hair of, 157 



S 



Salivary chromosomes, 284, 307 



Sumiu cecropia, 243 



Satureia, 278 



Saturnid moth, 246 



Scardafetta inca, 5 



Scliizophyllum commune, 268 



Sea-urchin egg, 203 



Secale, 38 



Selachia, ovocytes of, 264 



Self-differentiation, 201 



Semilethals, 298 



Sensitive period, 8, 13-22, 30, 44, 



73, 75, 87, 128, 198, 240, 246- 



247 

 Sepalody, 65 



Serological specificity, 99, 275 

 Sex chromosomes, dosage through, 



130 

 Sex-controlled phenotype, 125, 129 

 Sex determination, 66, 124 

 Sex-determining reactions, 172 

 Sex differentiation in vertebrates, 



181 

 Sex genes, cytoplasmic influence 



upon, 279 

 intracellular action of, 178 

 Sex hormones, 181, 183, 188, 190, 



219 



