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Zygote

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.


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Results from our forum


Re: Human Gamete Compatibility Going Backwards

By 'compatible' I mean able to form a zygote that results in a fertile , viable offspring. my emphasis

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by JackBean
Fri Jan 17, 2014 10:07 am
 
Forum: Evolution
Topic: Human Gamete Compatibility Going Backwards
Replies: 5
Views: 1512

Human Gamete Compatibility Going Backwards

... recent birth and going backward in time, would one reach a first-to-produce a compatible gamete individual? By 'compatible' I mean able to form a zygote that results in a fertile, viable offspring.

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by BiologicalRush
Thu Jan 02, 2014 7:08 pm
 
Forum: Evolution
Topic: Human Gamete Compatibility Going Backwards
Replies: 5
Views: 1512

meiome and genome

I thought eukaryote genetic inheritance came simply from the adding together of (recombinant) haploid chromosomes in the new zygote. But there is a lot of RNA involved? A crowd of unique proteins and mRNA in addition to the chromosomes in the gamete? See this: It is also noteworthy that ...

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by mattw
Sun May 05, 2013 2:58 am
 
Forum: Genetics
Topic: meiome and genome
Replies: 0
Views: 1743

Re: Gene targeting

It might be possible (in theory, though it would not be allowed) to remove a gene from a gamete or a single-celled zygote. However, in an adult human you would have to remove the gene from every cell, and there is no technology available to alter the DNA in so many cells at once.

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by jonmoulton
Tue Dec 18, 2012 4:47 pm
 
Forum: General Discussion
Topic: Gene targeting
Replies: 17
Views: 6017

Free-flowing cells and those that are stuck together?

I've just been thinking about the development of an embryo from the zygote stage. How is it that when cytokinesis takes place, the cells all stick together in a little ball? But then, later in life, some are not bound to others (red blood cells, sperm cells, ...

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by SheffJoe
Tue May 29, 2012 8:04 pm
 
Forum: Cell Biology
Topic: Free-flowing cells and those that are stuck together?
Replies: 2
Views: 2045
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