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Parthenogenesis   Listen
noun
parthenogenesis  n.  
1.
(Biol.) The production of new individuals from virgin females by means of ova which have the power of developing without the intervention of the male element; the production, without fertilization, of cells capable of germination. It is one of the phenomena of alternate generation. Cf. Heterogamy, and Metagenesis.
2.
(Bot.) The production of seed without fertilization, believed to occur through the nonsexual formation of an embryo extraneous to the embryonic vesicle.






Collaborative International Dictionary of English 0.48








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"Parthenogenesis" Quotes from Famous Books



... two kinds of sexual reproduction, has evidently been developed from the condition of hermaphroditism at a late period of the organic history of the world. It is at present the universal method of propagation of the higher animals.... The so-called virginal reproduction (Parthenogenesis) offers an interesting form of transition from sexual reproduction to the non-sexual formation of germ-cells which most resembles it.... In this case germ-cells which otherwise appear and are formed exactly like ...
— The Story of Atlantis and the Lost Lemuria • W. Scott-Elliot

... maintain their position in life, but it was distinctly unfavourable to any advance in quality. The method of sexual reproduction, which had existed in a germinal form more or less from the beginning, asserted itself ever more emphatically, and a method like that of parthenogenesis, or reproduction by the female unaided by the male (illustrated by the aphis), which had lingered on even beside sexual reproduction, absolutely died out in higher evolution. Now the fertilisation involved by the existence of two sexes is, as Weismann insisted, simply ...
— Essays in War-Time - Further Studies In The Task Of Social Hygiene • Havelock Ellis

... of these neuter-organisms as females. Ward says ("Pure Sociology," Ch. 14): "It does no violence to language or science to say that life begins with the female organism and is carried on a long distance by means of females alone. In all the different forms of asexual reproduction from fission to parthenogenesis, the female may in this sense be said to exist alone and perform all the functions of life including reproduction. In a word, life begins as female" (p. 313). Adding to this statement the assertion that the male developed at first ...
— Taboo and Genetics • Melvin Moses Knight, Iva Lowther Peters, and Phyllis Mary Blanchard

... crowns foretold us by weird sisters, a father's death to avenge, or to kill our wives from jealousy; but Lear may teach us to draw the line more clearly between a wise generosity and a loose-handed weakness of giving; Macbeth, how one sin involves another, and forever another, by a fatal parthenogenesis, and that the key which unlocks forbidden doors to our will or passion leaves a stain on the hand, that may not be so dark as blood, but that will not out; Hamlet, that all the noblest gifts of person, temperament, and mind slip like sand through the ...
— Among My Books - First Series • James Russell Lowell

... from the usual course of development may be noted. Parthenogenesis, or the development of an embryo from an egg-cell without the latter having been fertilized, has been described in species of Thalictrum, Antennaria and Alchemilla. Polyembryony is generally associated with the development of cells other than ...
— Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 • Various



Words linked to "Parthenogenesis" :   parthenogenetic, apomixis, androgeny, virgin birth, agamogenesis, gynogenesis



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