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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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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.


An organism produced by the union of two gametes.
The fertilized ovum before cleavage.
References in periodicals archive ?
Tetraploidy and partial endoreduplication in a tripronuclear zygote obtained after intracytoplasmic sperm injection.
When researchers injected the Cas9RNA protein targeting the mutation into already fertilized zygotes, they found that 67% of the resulting embryos had two normal copies of the MYBPC3 gene.
Micheline Matthews-Roth, Harvard University Medical School: "It is scientifically correct to say that an individual human life begins at conception, when egg and sperm join to form the zygote, and this developing human always is a member of our species in all stages of its life.
Therefore, even if the current state of technology does not permit the therapeutic correction of genetic diseases by means of editing via zygote injection, the two approaches suggested by Porteus and Dann could be attempted, even for genetically dominant diseases.
2 mM for 15 min) stimulus to treat zygotes (fertilized in vivo); embryos from both groups do not divide till 96 hpi [11].
175) zygote the product of the union National Health Act (No.
In the early-July the division of zygote was delayed until the free nuclear endosperm was formed (Fig.
Presumably, this would mean that any form of contraception (emergency or otherwise) that can prevent pregnancy after the creation of a single-celled zygote would be potentially problematic.
Three-fourths of zygotes or early embryos are naturally aborted, largely because of genetic defects.
This is the metamorphosis of the zygote transformed into a full-fledged human being.
The resultant zygote was activated and cultured in vitro and incubated under controlled environmental conditions over a week and later implanted into the uterus of an estrus synchronised recipient goat through laparoscopic technique.