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			== Parthenogenesis ==
			<gallery>
			File:Cnemidophorus-ThreeSpecies.jpg\|Three species of Cnemidophorus lizards
			File:Parthkomodo.jpg\|Komodo dragon exhibiting parthenogenesis
			File:Central_fusion_and_terminal_fusion_automixis.svg\|Diagram of central fusion and terminal fusion automixis
			File:Parthenogenesis_-_Bischoff,_Steve_R_2010.tif\|Parthenogenesis illustration by Steve R. Bischoff
			File:Hybridogenesis_in_water_frogs.gif\|Hybridogenesis in water frogs
			</gallery>

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'''Parthenogenesis''' is a type of [[asexual reproduction]] in which offspring develop from unfertilized eggs. It is particularly common in [[arthropods]] and [[rotifers]], but can also be found in species from other phyla. The term is derived from the Greek words ''parthenos'', meaning "virgin", and ''genesis'', meaning "birth".

== Overview ==
Parthenogenesis occurs naturally in many plants, some invertebrate animal species (including nematodes, water fleas, some scorpions, aphids, some mites, some bees, some Phasmida and parasitic wasps) and a few vertebrates (such as some fish, amphibians, reptiles and very rarely birds). This type of reproduction has been induced artificially in a few species including fish and amphibians.

== Types of Parthenogenesis ==
There are several types of parthenogenesis, including [[obligate parthenogenesis]], in which the organism can only reproduce asexually, and [[cyclical parthenogenesis]], where organisms alternate between sexual and asexual reproduction. Another type is [[haplodiploidy]], a sex-determination system in which one sex is haploid and the other diploid.

== Mechanisms ==
The mechanisms of parthenogenesis include [[automixis]], where the two sets of chromosomes come from the same individual, and [[apomixis]], where the chromosomes are identical to the parent's. In some cases, parthenogenesis can result in offspring that are genetically identical to the parent, a process known as [[cloning]].

== Evolutionary Implications ==
Parthenogenesis has important implications for [[evolution]]. It allows for rapid population growth and colonization of new areas. However, it also reduces genetic diversity, which can make populations more susceptible to diseases and other threats.

== See Also ==
* [[Asexual reproduction]]
* [[Sexual reproduction]]
* [[Hermaphroditism]]
* [[Budding]]
* [[Fission (biology)|Fission]]
* [[Fragmentation (reproduction)|Fragmentation]]
* [[Vegetative reproduction]]

== References ==
<references />

[[Category:Reproduction]]
[[Category:Asexual reproduction]]
[[Category:Evolutionary biology]]
[[Category:Genetics]]

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Parthenogenesis - Revision history

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