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Ancestral character states
Ancestral state reconstruction of selfing (left) and monoecy (right). Left, the evolution of outcrossing (black) and selfing (green). Right, the evolution of dioecy (black, for this analysis, outcrossing heterothallic species were treated as dioecious) and monoecy (blue).

Hanschen ER, Herron MD, Wiens JJ, Nozaki H, Michod RE. 2017. Repeated evolution and reversibility of self-fertilization in the volvocine green algae. Evolution (doi:10.1111/evo.13394)

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The Herron Lab at Georgia Tech studies various aspects of the evolutionary origins of multicellularity through a combination of experimental, theoretical, and comparative approaches. Our main model systems are the volvocine algae (Volvox and kin) and their close unicellular relative, Chlamydomonas reinhardtii.