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see reproductionreproduction,
capacity of all living systems to give rise to new systems similar to themselves. The term reproduction may refer to this power of self-duplication of a single cell or a multicellular animal or plant organism.
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The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a cell formed as a result of the fusion of gametes. The term “zygote” was introduced by the German botanist E. Strassburger. As distinct from gametes, a zygote has a diploid (double) set of chromosomes. The zygote develops directly after fertilization or, as in many algae and fungi, takes on a thick covering and becomes a dormant spore, often called a zygospore, for some time.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


An organism produced by the union of two gametes.
The fertilized ovum before cleavage.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Two such recent examples include a referendum on the Colorado ballot this fall that would define a fertilized egg as a person, and a draft regulation of the U.S.
Would massive invasive screening programs be needed to identify every newly fertilized egg so that the rights and protections of personhood can be guaranteed?
By my dejellyg procedure, cleavage defect of fertilized egg was rescued by addition of metal oxides at 3 min after insemination and successive cysteine treatment.
BERKELEY, Calif., January 13, 2017 -- Researchers here have found a way to reprogram mouse embryonic stem cells so that they exhibit developmental characteristics resembling those of fertilized eggs, or zygotes.
Of course we know the potential of the fertilized egg and the early embryo because we have awareness, thoughts and feelings.
They used fertilized eggs donated by couples undergoing fertility treatment, and which were unsuitable for in vitro fertilization (IVF), for the research.
Amendment 48 would make murderers out of all women who used forms of birth control that prevent implantation of fertilized eggs. Emergency contraception, dispensed at most hospitals to prevent unwanted pregnancies in girls and women who've been raped, would be illegal in Colorado.
So the term embryo was used to describe the fertilized egg. Now we've put it in the laboratory.
Particularly vehement religious fervor is now focused on the morning-after pill, which prevents pregnancy within the first few days after intercourse--sometimes by flushing out a fertilized egg. Around the country, there are more and more cases of pharmacists refusing to dispense the drug, according to NARAL.
After the fertilized egg, embryonic stem cells are the most flexible stem cell type.
Connie Mack (R-Fla.) declares, "For me, as long as that fertilized egg is not destined to be placed in a uterus, it cannot become life." In other words, for Hatch and Mack, location in a petri dish makes a lot of difference.
A fertilized egg normally splits in two within 24 hours, but no eggs had split after 36 hours, said researchers from the station, based in Ome on the outskirts of the capital.