al"><span style="font-size: 11.0pt;"><a href="javascript:TextPopup(this)" id="HotSpot10442" class="glossterm">Transition</a><script type="text/javascript">//<![CDATA[
TextPopupInit('HotSpot10442', 'POPUP10442');
//]]></script><span class="glosstext" id="POPUP10442" style="display: none;"> A transition occurs when a purine is substituted by a purine, or a pyrimidine by a pyrimidine.</span>/transversions 
		 ratio.</span></p></td>
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		<td style="vertical-align: top; padding: 0in 5.4pt 0in 5.4pt; pa