SUBJECT INDEX 



179 



Mciosis, details of 21-24; outline of 8, 9, 12 

 first meiotic division, inhibition of 23, 24, 



36, 40 (Table 2) 

 role of division apparatus in 66 

 second meiotic division, induction of, by 

 sperm penetration 24; by artificial 

 stimuli 24, 36-39; spontaneously 24, 

 34, 36, 37, 39; inhibition of 23, 24, 36, 

 38, 40 (Table 2); regression of 34, 35 



Membrana granulosa (see Cumulus 

 oophorus) 



Membrane fusion, as mechanism of sperm 

 entry into vitellus Frontispiece, 87, 88 



Metabolism of eggs 111, 114 



[ 35 S]methionine 52 



Microscopy, dark-ground 59, 65; electron 

 Frontispiece, 18-20, 26, 33, 34, 55, 56, 

 60, 61, 64-66, 68, 69, 86, 87, 89, 97; 

 fluorescence 17, 31, 32, 50, 60, 61, 64, 

 107; interference 107; phase-contrast 

 17, 20, 25, 26, 49-51, 68, 107; U.V. 17, 

 31, 32, 50, 51, 59-61 

 fixation and staining of eggs under micro- 

 scope 106, 107 

 preparation of eggs for: electron micro- 

 scopy 108; histology 108, 109; phase- 

 contrast microscopy 103-106 



Miolecithal egg, classification 52 



Mitochondria, structure of 64; number and 

 distribution of 56, 63, 64 



Mitosis, course of first division 48, 49; 

 course of subsequent divisions 50; 

 prophase of first cleavage 26, 27, 48 



Morula 9, 12, 61 



Mosaicism 35, 45, 76, 77 



Mucin coat of rabbit egg, chemical and 

 physical properties of 101; effect of 

 hormones on 101 ; impermeability of, 

 to spermatozoa 101 ; morphology of 

 14 (Fig. 10), 100, 101 ; time of deposition 

 of 101, 102 



Multivesicular body 56 



Nitrogen mustard, and 'immediate cleavage' 



77 

 Nuclcocytoplasmic relations in fertilization 



47, 48, 50-52, 61-63 

 Nucleic acids (see also Deoxyribonucleic acid 



and Ribonucleic acid), synthesis of 18, 



31, 61, 62 

 Nucleolus, chemical and physical properties 



of 17-19, 32-34; inclusions in 17, 32, 



49; passage of, into cytoplasm 19, 20 



in: cleavage nuclei 49; oocyte nuclei 17, 

 18, 21; pronuclei 24-34; subnuclei 34, 

 35 



nucleoloneme 19 



perinucleolar material or nucleolus-associ- 

 ated chromatin 17, 19, 49 

 Nucleus, sizes of 16-18 



cleavage nucleus, chemical properties of 

 50-52; formation of 48, 49; reduction 

 in volume of, during cleavage 50; 

 structure of 49, 50 



ootid nucleus (see Pronucleus) 



polar-body nucleus 47, 75 



primary-oocyte nucleus, chemical proper- 

 ties of 17, 18; form of chromosomes in 

 16; migration of nucleoli from 19, 20; 

 multinuclear 20, 21 ; structure of 16-19 



sub-nucleus 24, 34-36 



zygote nucleus of invertebrates 26 



Oocyte, primary (follicular or ovarian), 

 fragmentation of 84, 85; freezing of 

 117; 'giant' 20, 21; mitochondria in 

 63, 64; multinuclear 20, 21, 23, 24, 45; 

 nucleus of 16-21; number in ovary 8; 

 octaploid 40; outline of development 

 of 8, 9, 12; ovulated 12; protein syn- 

 thesis in 52; resistance to low tempera- 

 tures 110, 117; rna in 59, 61 

 secondary 9, 12, 23, 45, 84, 85, 110, 116, 

 117 



Oogenesis 8 



Oogonia 8, 16, 21; fusion of 21 



Ootid, definition of 12; uniqueness of 

 genotype 23 



Ovulation, induced by coitus 4, 10-11 

 (Table 1), 12 



Parthenogenesis 24, 34, 36-39, 57, 67, 84 



Passage of eggs through Fallopian tube 13 



Perforatorium 92, 100 



Perivitelline space, formation of 57; sperma- 

 tozoa in 88, 92, 94 



Phenotype of eggs, influenced by genotype 

 23 



Plasma membrane (see Vitelline membrane) 



Plasmalogen 62 



Polar body, details of formation of 21-24, 

 73, 74; nucleus formation in 47; outline 

 of formation of 12; sizes of 75, 76; 

 time of emission of, in relation to 

 ovulation and sperm penetration 77, 78 



