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Difference between revisions of "Zygote"

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zygote
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'''Definition'''
  
(Science: biology, genetics) A [[single]] [[diploid]] [[cell]] resulting from the [[fusion]] of [[male]] and [[female]] [[gametes]] at [[fertilization]] ([[sperm]] and [[ovum]]).
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''noun, plural: zygotes''
The cell resulting from the union of an ovum and a spermatozoon (including the organism that develops from that cell).The fusion of two haploid gametes with the consequential creation of a diploid zygote cell, which can raplidy multiply after this fertilisation of fusion of genetic material occurs.
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A [[cell]] in [[diploid]] state following [[fertilization]] or union of [[haploid]] [[male]] [[sex cell]] (e.g. [[sperm]]) and [[haploid]] [[female]] [[sex cell]] (e.g. [[ovum]]).  
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'''Supplement'''
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To be precise, zygote is the term used to refer to the [[cell]] as a result of the fusion of two [[haploid]] nuclei during [[fertilization]] until the first [[cleavage]].  When the zygote starts to divide and multiply, it is called an [[embryo]].
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''Word origin:'' from Greek ''zugōtos'' ‘joined’, from ''zugoun'' ‘to join’.
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''Related forms:'' zygotic (''adjective'').
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''Synonym:'' zygocyte.
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<br>''Compare:'' [[embryo]].
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<br>''See also:'' [[copula]], [[zygogenesis]], [[monozygotic twins]], [[heterozygosity]], [[homozygous]].

Latest revision as of 09:36, 25 August 2008

Definition

noun, plural: zygotes

A cell in diploid state following fertilization or union of haploid male sex cell (e.g. sperm) and haploid female sex cell (e.g. ovum).


Supplement



To be precise, zygote is the term used to refer to the cell as a result of the fusion of two haploid nuclei during fertilization until the first cleavage. When the zygote starts to divide and multiply, it is called an embryo.


Word origin: from Greek zugōtos ‘joined’, from zugoun ‘to join’.

Related forms: zygotic (adjective).

Synonym: zygocyte.
Compare: embryo.
See also: copula, zygogenesis, monozygotic twins, heterozygosity, homozygous.