A little bit is better than nothing: the incomplete parthenogenesis of salamanders, frogs and fish
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BMC Biology 2010, 8:78 doi:10.1186/1741-7007-8-78Published: 3 August 2010
A re-examination of the mitochondrial genomes of unisexual salamander lineages, published in BMC Evolutionary Biology, shows them to be the oldest unisexual vertebrates known, having been around for 5 million years. This presents a challenge to the prediction that lack of genetic recombination is a fast track to extinction.