Organism as a wholePutnam, 1916 - 379 pages |
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Page 72
... male cell which in the case of the spermatozoon contains only nuclear material and no cytoplasmic material except that contained in the tail which in some and possibly many species does not enter the egg . The male element - the ...
... male cell which in the case of the spermatozoon contains only nuclear material and no cytoplasmic material except that contained in the tail which in some and possibly many species does not enter the egg . The male element - the ...
Page 124
... male . Better opportunities were offered when a method was discovered which induced the development of the un- fertilized eggs of the frog . In 1907 , Guyer made the surprising observation that if he injected lymph or blood into the ...
... male . Better opportunities were offered when a method was discovered which induced the development of the un- fertilized eggs of the frog . In 1907 , Guyer made the surprising observation that if he injected lymph or blood into the ...
Page 124
... those animals in which the male is heterozygous for sex . Since this was written , two more of the parthenogenetic frogs over a year old died . Both were males . 8. The fact that the egg of so high a Artificial Parthenogenesis 125.
... those animals in which the male is heterozygous for sex . Since this was written , two more of the parthenogenetic frogs over a year old died . Both were males . 8. The fact that the egg of so high a Artificial Parthenogenesis 125.
Page 198
... ( a Hemipteran ) one - half of the spermatozoa McClung , C. E. , " The Accessory Chromosome - Sex Determina¬t ? ” Biol . Bull . , 1902 , iii . , 43 . of each male possessed a nucleolus , while in the 198 CHAPTER VIII.
... ( a Hemipteran ) one - half of the spermatozoa McClung , C. E. , " The Accessory Chromosome - Sex Determina¬t ? ” Biol . Bull . , 1902 , iii . , 43 . of each male possessed a nucleolus , while in the 198 CHAPTER VIII.
Page 199
Jacques Loeb. of each male possessed a nucleolus , while in the other half it was lacking . Montgomery afterward showed that Henking's nucleolus was an accessory chromosome . McClung was the first to recognize the importance of this fact ...
Jacques Loeb. of each male possessed a nucleolus , while in the other half it was lacking . Montgomery afterward showed that Henking's nucleolus was an accessory chromosome . McClung was the first to recognize the importance of this fact ...
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Common terms and phrases
agglutination animals annelids Arbacia Arch artificial membrane artificial parthenogenesis assumption bacteria Biol blastomeres blood body butyric acid cell division chapter characters chemical chromosome concentration contained cortical layer cytolysis definite determined digestion disintegration Driesch effect egg of purpuratus embryo enter the egg Entwcklngsmech enzyme existence experiments eyes f. d. ges fact female fertilized fish foreign species franciscanus frog Fundulus genus give rise graft groups grow growth heliotropic hemoglobin heredity hermaphroditic hybrids hypertonic solution idea induce Jour lack of oxygen large number larvæ latter light Lillie lipoids living matter Loeb male Mendelian heredity normal sea water nucleus observed ovaries oxidations parthenogenesis permeability phenomena phenomenon physicochemical Physiol pigment plants polyp positively heliotropic possible produced proteins protoplasm pure reaction regeneration result rôle salts sea urchin sea water sea-urchin egg segment serum shown sperm spermatozoön spermatozoön enters starfish Strongylocentrotus substances synthesis theory tion tissue transplanted unfertilized egg Wasteneys X chromosome