Zygote
You don't need to be Editor-In-Chief to add or edit content to WikiDoc. You can begin to add to or edit text on this WikiDoc page by clicking on the edit button at the top of this page. Next enter or edit the information that you would like to appear here. Once you are done editing, scroll down and click the Save page button at the bottom of the page.
| Zygote | ||
|---|---|---|
| Days | 1 | |
| Dorlands/Elsevier | z_01/12871436 | |
- For other meanings see Zygote (disambiguation).
A zygote (Greek: ζυγωτόν) is a cell that is 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).
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.
A polyspermic zygote is a zygote that has been fetilized by more than one sperm. Each year, world wide, tens of thousands of zygotes derived from the in-vitro insemination of human oocytes undergo polyspermic fertilization. These embryos must presently be discarded because it has never been demonstrated in any humans that polyspermic zygotes can develop normally to term after removal of the supernumerary male pronucleus. 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.
See also
| Preceded by oocyte Sperm | Stages of human development Zygote | Succeeded by Embryo |
 | This developmental biology article is a stub. You can help Wikipedia by expanding it. |
cs:Zygota da:Zygote de:Zygote et:Sügooteo:Zigoto fr:Zygote io:Zigoto id:Zigot it:Zigote lv:Zigota lt:Zigota mk:Зигот nl:Zygote ja:受精卵 no:Zygotesimple:Zygote sk:Zygota sr:Зигот fi:Tsygootti sv:Zygotur:لاقحہ
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
