DNA evidence for nonhybrid origins of parthenogenesis in natural populations of vertebrates.

  title={DNA evidence for nonhybrid origins of parthenogenesis in natural populations of vertebrates.},
  author={Elizabeth A. Sinclair and Jennifer B. Pramuk and Robert L Bezy and Keith A. Crandall and Jack Walter Sites},
  journal={Evolution; international journal of organic evolution},
  volume={64 5},
Naturally occurring unisexual reproduction has been documented in less than 0.1% of all vertebrate species. Among vertebrates, true parthenogenesis is known only in squamate reptiles. In all vertebrate cases that have been carefully studied, the clonal or hemiclonal taxa have originated through hybridization between closely related sexual species. In contrast, parthenogenetic reproduction has arisen in invertebrates by a variety of mechanisms, including likely cases of "spontaneous" (nonhybrid… CONTINUE READING

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