ext/css" href="template/styles/topic.min.css">
<script type="text/javascript" >
gRootRelPath = ".";
gCommonRootRelPath = ".";
gTopicId = "4.4.0_5";
</script>
 <meta name="topic-breadcrumbs" content="Part IV: Evolutionary Analysis > Constructing Time Trees" />
</head>

<body>
<script type="text/javascript" src="./ehlpdhtm.js"></script>

<h1>Calibrate Timetree with Molecular Clock</h1>
<p>MEGA provides two options for calibrating the molecular clock for RelTime 
 trees (where no calibration constraints have b