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Parthenogenesis in squamata
Parthenogenesis is a mode of asexual reproduction in which offspring are produced by females without the genetic contribution of a male. Among vertebrates, the only examples of true parthenogenesis, in which all-female populations reproduce without the involvement of males, are found in squamate reptiles (snakes and lizards). There are about 50 species of lizard and 1 species of snake that reproduce solely through parthenogenesis (obligate parthenogenesis).〔Vitt, Laurie J., and Janalee P. Caldwell. Herpetology: an introductory biology of amphibians and reptiles. Academic Press, 2013.〕 It is unknown how many sexually reproducing species are also capable of parthenogenesis in the absence of males (facultative parthenogenesis), but recent research has revealed that this ability is widespread among squamates.
== Mechanisms ==
Parthenogenesis can result from either full cloning of the mother's genome, or through the combination of haploid genomes to create a "half-clone." Both mechanisms of parthenogenesis are seen in reptiles.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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