Everything about Zygote totally explained
» For other meanings see Zygote (disambiguation).
A
zygote (from Greek zugōtos ‘joined’, from zugoun ‘to join’) is a
cell that's the result of
fertilization. That is, two
haploid cells—usually an
ovum from a
female and a
sperm cell from a
male—merge into a single
diploid cell called the
zygote (or
zygocyte).
In mammals, fusion of the sperm with the ovacyte occurs in the Fallopian tube and the resulting diploid zygote becomes embedded in the uterus wall.
Animal zygotes undergo
mitotic cell divisions to become an
embryo. Other organisms may undergo
meiotic cell division at this time (for more information refer to
biological life cycles).
Twins
Twins and
multiple births can be monozygotic (identical) or dizygotic (fraternal), meaning they arise from one or several (strictly, two) fertilization events.
However, polyspermic zygotes in mice have been manipulated so as to remove one of the two male pronuclei and made to survive birth.
In other species
A
biparental zygote is a
Chlamydomonas zygote that contains
chloroplast DNA (
cpDNA) from both parents.
Haploid + Haploid = Diploid
Further Information
Get more info on 'Zygote'.
|
External Link Exchanges
Do you know how hard it is to get a link from a large encyclopaedia? Well we're different and will prove it. To get a link from us just add the following HTML to your site on a relevant page:
<a href="http://zygote.totallyexplained.com">Zygote Totally Explained</a>
Then simply click through this link from your web page. Our crawlers will verify your link, extract the title of your web page and instantly add a link back to it. If you like you can remove the words Totally Explained and embed the link in article text.
As long as your link remains in place, we'll keep our link to you right here. Please play fair - our crawlers are watching. Your site must be closely related to this one's topic. Any kind of spamming, dubious practises or removing the link will result in your link from us being dropped and, potentially, your whole site being banned. |
