Materialize Radio Button

<!DOCTYPE html>
  <html>
  <head>
  <link href="http://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.97.8/css/materialize.min.css">
  <script type="text/javascript" src="https://code.jquery.com/jquery-2.1.1.min.js"></script>    
  <script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.97.8/js/materialize.min.js"></script>
      <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
  </head>
 <body> 
   <p>
      <input name="gender" class="with-gap" type="radio" id="gender_id_red" />
      <label for="gender_id_red">Male</label>
    </p>
    <p>
      <input name="gender" class="with-gap" type="radio" id="gender_id_yellow" />
      <label for="gender_id_yellow">Female</label>
    </p>
 </body>
  </html>