The First Sexual Lineage and the Relevance of Facultative Sex

@article{Dacks1999TheFS,
  title={The First Sexual Lineage and the Relevance of Facultative Sex},
  author={J. Dacks and A. Roger},
  journal={Journal of Molecular Evolution},
  year={1999},
  volume={48},
  pages={779-783}
}
Abstract. Models for the origin of the sex incorporate either obligate or facultative sexual cycles. The relevance of each assumption to the ancestral sexual population can be examined by surveying the sexual cycles of eukaryotes, and by determining the first lineage to diverge after sexuality evolved. Two protistan groups, the parabasalids and the oxymonads, have been suggested to be early-branching sexual lineages. A maximum-likelihood analysis of elongation factor-1α sequences shows that the… Expand
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