parthenogenesis

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parthenogenesis

 [pahr″thĕ-no-jen´ĕ-sis]
a modified form of sexual reproduction in which a gamete develops into a new individual without the fertilization of an oocyte by a spermatozoon, as in certain arthropods and other animals; it may occur as a natural phenomenon or be induced by chemical or mechanical stimulation (artificial parthenogenesis). adj., adj parthenogenet´ic.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

par·the·no·gen·e·sis

(par'the-nō-jen'ĕ-sis),
A form of nonsexual reproduction, or agamogenesis, in which the female reproduces its kind without fecundation by the male.
[G. parthenos, virgin, + genesis, product]
Farlex Partner Medical Dictionary © Farlex 2012

parthenogenesis

(pär′thə-nō-jĕn′ĭ-sĭs)
n.
1. A form of reproduction in which an unfertilized egg develops into a new individual, occurring commonly among insects and certain other arthropods.
2. The artificial activation of an unfertilized usually mammalian egg, resulting in an embryolike cell cluster from which stem cells can be harvested.

par′the·no·ge·net′ic (-jə-nĕt′ĭk), par′the·no·gen′ic (-jĕn′ĭk) adj.
par′the·no·ge·net′i·cal·ly adv.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

par·the·no·gen·e·sis

(pahr'thĕ-nō-jen'ĕ-sis)
A form of nonsexual reproduction, or agamogenesis, in which the female reproduces its kind without fecundation by the male.
[G. parthenos, virgin, + genesis, product]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

parthenogenesis

The development of an unfertilized egg into an adult organism. Virgin birth. This occurs naturally in bees and ants and in some animal species development of an ovum can be induced chemically or by pricking with a fine glass fibre. The result is a clone of the mother cell identical in all respects. Only females can be produced by parthenogenesis, as no Y chromosome is present. If achieved, human parthenogenesis would make men biologically redundant. Very early human embryos derived only from ova have been produced experimentally by a parthenogenetic technique using chemicals that changed the concentration of ions in the ova.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

parthenogenesis

the development of an individual from an egg without fertilization by a sperm. The process occurs mainly in lower invertebrates, particularly insects. The egg cell can be HAPLOID (1) to produce, for example, male honeybees (drones) or DIPLOID (1) as produced in wingless female aphids which, during the summer months, produce diploid eggs by MITOSIS that develop into female adults, only forming haploid gametes by MEIOSIS in the autumn prior to normal sexual reproduction.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
These studies demonstrate that parthenogenic stem cells can be used for tissue engineering.
ISCO will implement its parthenogenic stem cell processes at this facility during 2010 and will adopt current good manufacturing practice (cGMP) standards.
The success of the rotifers in this experiment was aided in part by their highly opportunistic nature and parthenogenic reproduction.
Exposure concentrations for each chemical were within the range of concentrations that affected parthenogenic reproduction in standard life cycle tests.
Early pulp of willingly entertained notions that seemed superficially forward-thinking ("What if there were an all-female parthenogenic society?") at the same time that it needed to re-establish the status quo (for example, the sex-battle stories in which all-female societies must be converted to heterosexism).
Charlotte Perkins Gilman's 1915 feminist utopian novel Herland found perfection in a world where men did not exist and where parthenogenic births produced only girl children; contemporary fiction writer Marge Piercy's 1976 novel, Woman on the Edge of Time, offered a similar social vision.
First, teachers and students should use McWilliams as a corrective in relationship to the "New Western History." Too often, I think, there is a parthenogenic quality to Western History written in the last quarter of the twentieth century.
In instances of parthenogenic and spontaneous generation it appears that form exists, at least to some extent, in the generative material.
In mammals, parthenogenic embryos--if "embryos" they are--eventually fail.
In sidestepping a thoroughgoing critique of colonialism as a racial as well as gendered dynamic, feminist critics of Herland become what I will call "parthenogenic genealogists," women with faith in the "purity" of feminism's origins because they are inattentive to the historical imbrication of feminism, colonialism, and imperialism.
In fact, those fantastically parthenogenic genealogies that remain the stock in trade of our curricula, and make it seem as if Chaucer begat Shakespeare, who begat Milton, and so forth, could accommodate with particular ease the narratives that the period devised to intensify the identity politics of a new age of nations.
That is because they are parthenogenic, ie they don't need to be mated.