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Fertilisation - Revision history
2026-05-11T07:19:03Z
Revision history for this page on the wiki
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2025-02-18T04:36:52Z
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 04:36, 18 February 2025</td>
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Prab: CSV import
2024-02-23T03:52:25Z
<p>CSV import</p>
<p><b>New page</b></p><div>'''Fertilisation''' is a process in sexual reproduction that involves the union of male ([[sperm]]) and female ([[ovum]]) gametes (each with a single, haploid set of chromosomes) to produce a [[diploid]] zygote.<br />
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== Process ==<br />
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The process of fertilisation involves several stages:<br />
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# '''Contact:''' The sperm makes contact with the ovum's protective outer layer, the [[zona pellucida]].<br />
# '''Acrosomal reaction:''' The sperm's acrosome releases digestive enzymes to break down the zona pellucida.<br />
# '''Sperm binding:''' Proteins on the sperm head bind to the zona pellucida.<br />
# '''Cortical reaction:''' The ovum releases enzymes to harden the zona pellucida and prevent other sperm from binding.<br />
# '''Fusion:''' The sperm and ovum plasma membranes fuse, allowing the sperm to enter the ovum.<br />
# '''Activation:''' The ovum completes its second meiotic division, forming the mature ovum and second polar body.<br />
# '''Nuclear fusion:''' The sperm and ovum nuclei fuse to form the diploid zygote.<br />
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== Consequences ==<br />
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Fertilisation initiates the development of a new individual organism, starting with the formation of the zygote, which develops into an [[embryo]] and eventually a fully formed individual. It also determines the genetic makeup of the new individual, including its sex.<br />
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== See also ==<br />
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* [[Reproduction]]<br />
* [[Sexual reproduction]]<br />
* [[Sperm]]<br />
* [[Ovum]]<br />
* [[Zygote]]<br />
* [[Embryo]]<br />
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== References ==<br />
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<references /><br />
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[[Category:Reproduction]]<br />
[[Category:Sexual reproduction]]<br />
[[Category:Embryology]]<br />
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