http://simonwillison.net/2009-11-16T18:35:48+00:00Simon Willison2009-11-16T18:35:48+00:002009-11-16T18:35:48+00:00https://simonwillison.net/2009/Nov/16/grandmas/#atom-tag

<p><strong><a href="http://www.newsweek.com/id/222472">How Grandmas May Give Kids an Evolutionary Edge</a></strong></p> Absolutely fascinating: XY v.s. XX chromosomes mean that paternal grandmothers have a 50% chance of sharing an X with their son’s daughters, but a 0% chance of sharing an X with their son’s sons. A study on survival rates of 43,000 children found a corresponding correlation with the proximity to a paternal or maternal grandmother. Men: Dad’s Mum is out to get you! <p>Tags: <a href="https://simonwillison.net/tags/chromosomes">chromosomes</a>, <a href="https://simonwillison.net/tags/genetics">genetics</a>, <a href="https://simonwillison.net/tags/grandmas">grandmas</a>, <a href="https://simonwillison.net/tags/science">science</a></p>