Meta-analysis of MZ and DZ correlations in humans^a.

<p>These show the correlations (<i>r</i>) of phenotypes of twins, averaged over ranges of traits estimated in large data sets</p>a<p>Data from published papers by N.G. Martin and colleagues of the Queensland Institute of Medical Research, Brisbane (<a href="http://www.genepi.edu.au" target="_blank">www.genepi.edu.au</a>)</p>b<p>Opposite sex