BMC Evolutionary Biology
Volume 7
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  Research articleSexual selection and the evolution of obligatory sexLilach Hadany  and Tuvik Beker  Department of Biological Sciences, University of Iowa, Iowa City, Iowa 52242, USA  author email corresponding author email
BMC Evolutionary Biology 2007,
7:245doi:10.1186/1471-2148-7-245
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| Published: |
20 December 2007 |
Abstract
Background
Among the long-standing conundrums of evolutionary theory, obligatory sex is one of the hardest. Current theory suggests multiple factors that might explain the benefits of sex when compared with complete asexuality, but no satisfactory explanation for the prevalence of obligatory sex in the face of facultative sexual reproduction.
Results and Conclusion
We show that when sexual selection is present obligatory sex can evolve and be maintained even against facultative sex, under common scenarios of deleterious mutations and environmental changes. | 
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