Table of Contents
International Journal of Evolutionary Biology
Volume 2011, Article ID 165919, 9 pages
Research Article

The Selfish Grandma Gene: The Roles of the X-Chromosome and Paternity Uncertainty in the Evolution of Grandmothering Behavior and Longevity

1Department of Biological Anthropology, University of Cambridge, Pembroke Street, Cambridge CB2 3QY, UK
2Zentrum für Philosophie und Grundlagen der Wissenschaft, Universität Giessen, Otto-Behaghel-Straße 10 C, 35394 Giessen, Germany

Received 6 October 2010; Revised 7 December 2010; Accepted 18 January 2011

Academic Editor: Alberto Civetta

Copyright © 2011 Molly Fox et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Supplementary Material

In the supplementary materials, we include an analysis of rates of paternal discrepancy based on surveys of the Standard Cross Cultural Sample, comparing traditional and non-traditional societies' cultural attitudes towards extramarital affairs, and reported frequencies of extra-marital sex. We also provide more detail on the formulae used in calculating how paternal discrepancy alters the genetic relatedness between paternal grandmothers and their grandchildren, for X-chromosome and autosomes.

  1. Supplementary Material