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Signs of sex: what we know and how we know it
Journal article   Open access   Peer reviewed

Signs of sex: what we know and how we know it

Andrew M Schurko, Maurine Neiman and John M Logsdon
Trends in ecology & evolution (Amsterdam), Vol.24(4), pp.208-217
2009
DOI: 10.1016/j.tree.2008.11.010
PMID: 19282047
url
https://doi.org/10.1016/j.tree.2008.11.010View
Published (Version of record) Open Access

Abstract

The predominance of sexual reproduction indicates that it must confer profound benefits, considering its significant costs relative to asexuality. However, definitively determining whether a lineage engages in sex is often complicated by the potential for cryptic sex, especially among unfamiliar organisms. Here we consider the strengths and weaknesses of various molecular- and organismal-based approaches for recognizing signs of sex and describe their applications and relevance to evolutionary biology. We review recent studies that use these methods; some analyses even dispute several ‘ancient’ asexual taxa, and suggest they are recently derived or might be covertly sexual. More broadly, a better understanding of which organisms have sex and how they do it will deepen our understanding of the distribution, maintenance and evolution of sexual reproduction.

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