INDEX 



223 



Gametogenesis, scheme of, 30 



Gametophyte, 212 



Gene, 169 



Germinal vesicle, 55, 65 



Germ track, 80, 82, 83, 85 



Gonad differentiated from soma, 81 



Gonomery, 78, 79 



Growth period in gametogenesis, 31 



Haploid condition, 28 



in Aggregata, 205 



in plants, 214 



Hereditary factors, 168, 174 

 Heterochromosomes, 98 

 Heterotype division, 29 

 Homotype division, 29 

 Hybrids, Ascaris, 133 



Drosera, 183 



Echinoderms, 158 



Echinus x Mytilus, 161 



Lepidoptera, 184, 186 



Menidia x Fundulus, 132 



Mule, 186 



Oenothera lota x 0. gigas, 146, 184 



Pheasant and Fowl, 186 



Pigeon and Dove, 186 



sterility of, 183 



Idiochromatin, 155, 193 

 Idioplasm, 154 



in relation to chromatin, 155 

 Idiosome, 70 



Karyogamy, 72 

 Karyokinesis, 5 

 Karyolymph, 19 

 Karyomere, 131 

 Karyosome, 20 



of Protista, 201 

 Kinetonucleus, 193, 202 



Leptotene stage, 33 



Linin, 18 



Linkage of factors, 178 



Macrogamete, 28 

 Macronucleus, 194, 202 

 Mantle fibres, 21 

 Megaspore, 213 

 Meiosis, 28, 35 



in Aggregata, 206 



in Ascaris, 51 



in Copepods, 49 



in the female, 56, 58, 72 



in insects, 42 



in Lepidosiren, 38 



in plants, 212 



in Tomopteris, 32 



with tetrad formation, 49 

 Membrane, cell, 3 



nuclear, 19 

 Mendel's law, 168 

 Metaphase, n 

 Metaplastic bodies, 4 

 Microgamete (see also Spermatozoon), 28 



Micronucleus, 194, 202 

 Microspore, 213 

 Mitochondria, 195 

 Mitosis, 6, 7, 8, 162 



abnormal, 145, 163, 165 



in Protista, 204, 205, 206, 207, 208, 211 

 Monad, 49 

 Monaster, 22 

 Multipolar mitosis, 163 

 Mutation, 180 



Nebenkern, 69, 200 

 Nuclear membrane, 19 

 Nucleolus, 5 



in oogenesis, 62 

 Nucleus, 4 



in heredity, 154 



in morphogenesis, 187 



of Protista, 201 



Octad chromosomes, 52 

 Oenothera gigas, 149 

 Oenothera lata, 146 

 Oocyte, 31 

 Oogonium, 29 



Organ- forming substances, 188 

 Ovogonium, 29 

 Oxychromatin, 18 



Pachytene stage, 33 

 Paraplastic bodies, 195 

 Parasynapsis, 43 

 Parasyndesis, 36, 43, 47 

 Parthenogenesis, 86, 94 



artificial, 87, 94, 96 



facultative, 87, 91, 93 



Mendelian segregation in, 171 



obligatory, 87, 88, 90 

 Plasmosome, 5, 9 

 Plastin, 5 



Plastochondria, 195 

 Plastocont, 195 

 Plastosome, 195 

 Polar body, 23, 29, 57, 72, 74 

 Pollen mother- cell, 213 

 Polyenergid nuclei, 209 

 Polymorphic nuclei, 26 

 Polyploid nuclei, 148, 209 

 Polyspermy, 77, 163 

 Post-reduction, 54 

 Pre-reduction, 54 

 Primordial germ-cell, 29 

 Primula kewensis, 151 

 Primula sinensis, tetraploid variety, 170 

 Prochromosomes, 21 

 Pronucleus, 72 

 Prophase, 8, 14 

 Protoplasm, i 



Reduction division, 34 



Repulsion of hereditary factors, 177 



Segregation, Mendelian, and chromosomes, 



168 



in bud variation, 172 

 in parthenogenesis, 171 



