Why anisogamy drives ancestral sex roles

@article{Lehtonen2016WhyAD,
  title={Why anisogamy drives ancestral sex roles},
  author={Jussi Lehtonen and Geoffrey Alan Parker and Lukas Sch{\"a}rer},
  journal={Evolution},
  year={2016},
  volume={70}
}
There is a clear tendency in nature for males to compete more strongly for fertilizations than females, yet the ultimate reasons for this are still unclear. Many researchers—dating back to Darwin and Bateman—have argued that the difference is ultimately driven by the fact that males (by definition) produce smaller and more numerous gametes than females. However, this view has recently been challenged, and a formal validation of the link between anisogamy and sex roles has been lacking. Here, we… 
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