>## g o </span></span>
<span><span class="co">## 1 1 </span></span>
<span><span class="co">## attr(,"add_ind")</span></span>
<span><span class="co">## [1] TRUE</span></span>
<span><span class="co">## attr(,"h2")</span></span>
<span><span class="co">## [1] 0.5</span></span></code></pre>
<p>The default family contains the index person as well as a father,
mother, one sibling, both maternal and paternal grandparents.</p>
<div class="sourceCode" id="cb8"><pre class="downlit sourceCode r">
<code class="sourceCod