parthenogenesis

Definitions

  • WordNet 3.6
    • n parthenogenesis process in which an unfertilized egg develops into a new individual; common among insects and some other arthropods
    • n parthenogenesis human conception without fertilization by a man
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Webster's Revised Unabridged Dictionary
  • Interesting fact: Turkeys can reproduce without having sex. It's called parthenogenesis
    • parthenogenesis (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.
    • parthenogenesis (Bot) The production of seed without fertilization, believed to occur through the nonsexual formation of an embryo extraneous to the embryonic vesicle.
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Century Dictionary and Cyclopedia
  • Interesting fact: Parthenogenesis is the term used to describe the process by which certain animals are able to reproduce themselves in successive female generations without intervention of a male of the species. At least one species of lizard is known to do so.
    • n parthenogenesis Reproduction by a virgin; in zoology, one of the phenomena attending alternate generation among animals which have sex, a kind of agamogenesis in which an imperfect female individual, hatched from an egg laid by a perfect female after ordinary sexual intercourse, continues to reproduce its kind for one or more generations without renewed impregnation. Parthenogenesis characterizes the reproduction of many insects, as aphids or plant-lice.
    • n parthenogenesis In botany: The production of a perfect embryo without the intervention of pollen. According to Strasburger, the embryos thus formed are adventitious outgrowths from the cellular tissue of the nucellus and outside of the embryo-sac.
    • n parthenogenesis Alternation of generations; metagenesis.
    • n parthenogenesis The type of parthenogenesis in which the fertilized eggs produce only one sex.
    • n parthenogenesis The normal development of some of the eggs laid by a female animal without fertilization, as in the honey-bee. After the nuptial flight the queen bee returns to the hive with the spermatic receptacle filled with spermatozoa, which retain their vitality for the rest of her life, and fertilize some of the eggs, but not all, as they pass through the oviduct past the duct of the spermatic receptacle. The eggs that are not fertilized develop into male bees or drones, while the fertilized eggs produce females, which may become queens or perfect females, or workers or arrested females, according to the treatment which they receive from the workers after they have been laid. The workers, which make no nuptial flight and are incapable of sexual union, sometimes lay eggs which give rise to males.
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Chambers's Twentieth Century Dictionary
    • n Parthenogenesis pär-the-nō-jen′e-sis reproduction without renewed impregnation by a male, as in aphids or plant-lice, &c
    • Parthenogenesis also Parthenog′eny
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Etymology

Webster's Revised Unabridged Dictionary
Gr. parqe`nos a virgin + E. genesis,

Usage

In literature:

Some workers, indeed, are capable of parthenogenesis, and give birth to children who never had fathers.
"Kwaidan: Stories and Studies of Strange Things" by Lafcadio Hearn
The question may be raised whether the larvae produced by artificial parthenogenesis can reach the mature stage.
"Darwin and Modern Science" by A.C. Seward and Others
Dallas (who has translated Von Siebold on Parthenogenesis, and many German works, and who writes very good English) to translate the book.
"The Life and Letters of Charles Darwin, Volume II (of II)" by Charles Darwin
Of the union of the two sexes, females alone are born; parthenogenesis gives birth at the same time to females and males.
"Bramble-bees and Others" by J. Henri Fabre
But let us return to that special form of her resistless intervention that we find in parthenogenesis.
"The Life of the Bee" by Maurice Maeterlinck
And did not parthenogenesis occur in the silk moth?
"The Inside of the Cup, Complete" by Winston Churchill
Grimm on parthenogenesis, 168.
"Our Common Insects" by Alpheus Spring Packard
In all of these nuts it seemed to me we were probably dealing with parthenogenesis.
"Northern Nut Growers Association, Report of the Proceedings at the Fourth Annual Meeting" by Various
In ordinary parthenogenesis the fruit grows without any pollen influence at all.
"Northern Nut Growers Association Report of the Proceedings at the Fifth Annual Meeting" by Various
A chapter in Darwinism, and parthenogenesis.
"Introduction to the Science of Sociology" by Robert E. Park
Parthenogenesis is no longer wonderful; in fact, the wonder is that it should not oftener occur.
"The Variation of Animals and Plants Under Domestication, Volume II (of 2)" by Charles Darwin
Sex-generation is the mark of a higher organism than parthenogenesis.
"A Critical History of Greek Philosophy" by W. T. Stace
He supports parthenogenesis in some plants.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3" by Various
Name some animal in which parthenogenesis commonly takes place.
"A Guide for the Study of Animals" by Worrallo Whitney
Parthenogenesis, or development of the female gamete without fertilization, is known to occur in many groups of the animal kingdom.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3" by Various
This power of parthenogenesis, however, cannot continue indefinitely without extinction.
"Degeneracy" by Eugene S. Talbot
You can bring about parthenogenesis only by positive ions.
"The Universe a Vast Electric Organism" by George Woodward Warder
PARTHENOGENESIS in the Tenthredinae, i.
"The Descent of Man and Selection in Relation to Sex" by Charles Darwin
In the case of many insects in which parthenogenesis occurs, the determination of sex depends upon fertilisation.
"The Biological Problem of To-day" by Oscar Hertwig
It has been shown that in the artificial summer of a green-house, parthenogenesis may continue for four years.
"Herbert Spencer" by J. Arthur Thomson
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In science:

Lost Sex: The Evolutionary Biology of Parthenogenesis.
A Testing Framework for P Systems
Characterization of intersex production in trichogramma kaykai infected with parthenogenesis-inducing wolbachia.
A Developmental Network Theory of Gynandromorphs, Sexual Dimorphism and Species Formation
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