an class="k">else</span><span class="p">:</span> <span class="c1"># sex chromosome</span>
            <span class="n">com_chr</span>             <span class="o">=</span> <span class="n">draw_norm</span><span class="o">*</span><span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">random</span><span class="o">.</span><span class="n">uniform</span><span class="p">(</span><span class="n">low</span><span class="o">=</span><span class="mf">0.5</span><span class="p">,</span><span