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Sister chromosome pairing maintains heterozygosity in parthenogenetic lizards

Author

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  • Aracely A. Lutes

    (Stowers Institute for Medical Research, Kansas City, Missouri 64110, USA
    University of Kansas Medical Center, Kansas City, Kansas 66160, USA)

  • William B. Neaves

    (Stowers Institute for Medical Research, Kansas City, Missouri 64110, USA
    University of Missouri Kansas City, School of Medicine, Kansas City, Missouri 64110, USA)

  • Diana P. Baumann

    (Stowers Institute for Medical Research, Kansas City, Missouri 64110, USA)

  • Winfried Wiegraebe

    (Stowers Institute for Medical Research, Kansas City, Missouri 64110, USA)

  • Peter Baumann

    (Stowers Institute for Medical Research, Kansas City, Missouri 64110, USA
    University of Kansas Medical Center, Kansas City, Kansas 66160, USA
    Howard Hughes Medical Institute, Kansas City, Missouri 64110, USA)

Abstract

The female is the species The existence of an all-female species of whiptail lizard, formed as a hybrid between sexual species, has been known since 1962. But how it produces mature eggs with a full somatic chromosomal complement has remained unclear, as has a mechanism for maintaining genetic diversity. Lutes et al. now show that in this species (Aspidoscelis tesselata) meiosis initiates with twice the number of chromosomes, compared to sexual species, and that pairing and recombination take place between genetically identical sister chromosomes instead of between homologues.

Suggested Citation

  • Aracely A. Lutes & William B. Neaves & Diana P. Baumann & Winfried Wiegraebe & Peter Baumann, 2010. "Sister chromosome pairing maintains heterozygosity in parthenogenetic lizards," Nature, Nature, vol. 464(7286), pages 283-286, March.
    • Handle: RePEc:nat:nature:v:464:y:2010:i:7286:d:10.1038_nature08818
    DOI: 10.1038/nature08818
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