Technical Comments

Response to Comment on "Transitions to Asexuality Result in Excess Amino Acid Substitutions"

See allHide authors and affiliations

Science  08 Sep 2006:
Vol. 313, Issue 5792, pp. 1389
DOI: 10.1126/science.1128745

You are currently viewing the abstract.

View Full Text

Abstract

Asexual populations experience a reduction in the efficiency of selection when compared with sexual populations. Because asexual lineages of Daphnia pulex exhibit no consistent change in mitochondrial base-composition bias, Butlin suggests that this bias is not maintained by selection. On the basis of frequencies of polymorphic directional base changes, we suggest that it predominantly reflects mutation bias.

View Full Text