zygote


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zygote

 [zi´gōt]
the cell resulting from union of a male and a female gamete; the fertilized ovum (see also reproduction). More precisely, the cell after synapsis at the completion of fertilization until first cleavage. adj., adj zygot´ic.
Development of the zygote. A, A sperm enters the ovum. B, The 23 chromosomes from the sperm mingle with the 23 chromosomes from the ovum, restoring the diploid number to 46. C, The fertilized ovum, now called a zygote, is ready for the first mitotic cell division. From McKinney et al., 2000.

zy·gote

(zī'gōt),
1. The diploid cell resulting from union of a sperm and a secondary oocyte. Compare: conceptus.
2. The early embryo that develops from a fertilized oocyte.
[G. zygōtos, yoked]

zygote

/zy·gote/ (zi´gōt) the diploid cell resulting from union of a male and a female gamete. More precisely, the cell after synapsis at the completion of fertilization until first cleavage.zygot´ic

zygote

(zī′gōt′)
n.
1. The cell formed by the union of two gametes, especially a fertilized ovum before cleavage.
2. The organism that develops from a zygote.

zy·got′ic (-gŏt′ĭk) adj.
zy·got′i·cal·ly adv.

zygote

[zī′gōt]
Etymology: Gk, zygon, yoke
the combined cell produced by the union of a sperm pronucleus and an egg pronucleus at the completion of fertilization until the first cleavage. Also called zygocyte.

zy·gote

(zī'gōt)
1. The diploid cell resulting from union of a sperm and an oocyte.
Compare: conceptus
2. The early embryo that develops from a fertilized oocyte.
[G. zygōtos, yoked]

zygote

An egg (ovum) that has been fertilized but has not yet undergone the first cleavage division. A zygote contains a complete (DIPLOID) set of chromosomes, half from ovum and half from the fertilizing sperm, and thus all the genetic code for a new individual.

zygote

the DIPLOID (1) cell produced by the fusion of the nuclei of male and female gamete nuclei at FERTILIZATION.

Zygote

The result of the sperm successfully fertilizing the ovum. The zygote is a single cell that contains the genetic material of both the mother and the father.

zy·gote

(zī'gōt)
1. Diploid cell resulting from union of a sperm and a secondary oocyte.
2. Early embryo that develops from a fertilized oocyte.
[G. zygōtos, yoked]

zygote

the cell resulting from union of a male and female gamete; the fertilized ovum. More precisely, the cell after synapsis at the completion of fertilization until first cleavage.
References in periodicals archive ?
Endoreduplication of the hyperhaploid maternal complement and abnormal pronuclear formation in a human zygote obtained after intracytoplasmic sperm injection.
Section 57(3) provides that '[n]o person may import or export human zygotes or embryos without the prior written approval of the Minister.
The unfertilized eggs, the ones fertilized without cleavage, the zygotes in cleavages I-IV and the anomalous (A) were evaluated in each experiment and typical examples of these categories can be found in Fig.
The same would be true if an individual asserted that he objects to dispensing EC because he believes that it kills a person (defined as a single-celled zygote), and one day we learn that, in fact, EC is only effective prior to the creation of a single-celled zygote.
Embryos microinjected with Cx 43 dsRNA at the zygote stage could trigger the suppression in the amount of target mRNA at the blastocyst stage.
Furthermore, it has been demonstrated that the single-cell zygote is polarized in such a fashion that it has a head end, a foot end, a right and left side, and a front and back, that correspond to those same areas in the adult.
He wished to "retain the old idea of the historical distinctness of the two alternating phases" and he did not "feel prepared to concede the full morphogenetic unity of the spore and zygote.
In about a third of cases, the twins are identical, meaning that they come from a single fertilised egg, or zygote, which then for some reason splits into two embryos.
IF FERTILIZATION DOES OCCUR, HOWEVER, PLAN B IS LIKELY TO PREVENT THE ZYGOTE FROM IMPLANTING ITSELF ON THE UTERINE WALL, WHERE IT WOULD THEN EVOLVE INTO AN EMBRYO, AND THEN A FETUS .
Mix them together to form a zygote on a "Petri dish," representing in vitro fertilization.
The nucleus of the sperm cell travels deep into the ovum and fuses with the egg nucleus, mixing his rich genetic material with hers and bringing an entirely new life-form into being: a fertilized one-celled organism, or zygote - the first "you.