Organism as a wholePutnam, 1916 - 379 pages |
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Page 70
... induce the egg to develop into an embryo without a spermatozoön . This may mean that the protoplasm of the egg is the future embryo , while the chromosomes of both egg and sperm nuclei furnish only the individual characters . 1 Loeb , J ...
... induce the egg to develop into an embryo without a spermatozoön . This may mean that the protoplasm of the egg is the future embryo , while the chromosomes of both egg and sperm nuclei furnish only the individual characters . 1 Loeb , J ...
Page 78
... induce artificial membrane formation , as we shall see in the next chapter . Godlewski found that if the sperm of Chatopterus and the sperm of sea urchins are mixed the mixture is not able to induce development or membrane formation ...
... induce artificial membrane formation , as we shall see in the next chapter . Godlewski found that if the sperm of Chatopterus and the sperm of sea urchins are mixed the mixture is not able to induce development or membrane formation ...
Page 100
... induce membrane formation , and that the essential feature in the causation of development is a cytolysis of the superficial or cortical layer of the egg . As soon as this layer is destroyed the development of the egg can begin . The ...
... induce membrane formation , and that the essential feature in the causation of development is a cytolysis of the superficial or cortical layer of the egg . As soon as this layer is destroyed the development of the egg can begin . The ...
Page 102
... induces membrane formation . in the sea - urchin egg . The watery extract of sperm of starfish is especially active , but the degree of activity varies considerably with the species of starfish from which the sperm is taken . The eggs ...
... induces membrane formation . in the sea - urchin egg . The watery extract of sperm of starfish is especially active , but the degree of activity varies considerably with the species of starfish from which the sperm is taken . The eggs ...
Page 103
... in the case of foreign sperm we can cause membrane formation by both the living and the dead spermatozoön , only the living spermatozoon of the same species can induce membrane formation . This might Artificial Parthenogenesis 103.
... in the case of foreign sperm we can cause membrane formation by both the living and the dead spermatozoön , only the living spermatozoon of the same species can induce membrane formation . This might Artificial Parthenogenesis 103.
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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