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Science 17 February 2006:
Vol. 311. no. 5763, pp. 960 - 961
DOI: 10.1126/science.1124663
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Perspectives

EVOLUTION:
Why Sex?

Rasmus Nielsen

It is assumed that most organisms have sex because the resulting genetic recombination allows Darwinian selection to work better. It is now shown that in water fleas, recombination does lead to fewer deleterious mutations.

The author is at the Center for Bioinformatics and Department of Biology, University of Copenhagen, Universitetsparken 15, 2100 Kbh Ø Denmark. E-mail: rasmus{at}binf.ku.dk

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Science. ISSN 0036-8075 (print), 1095-9203 (online)