how to append checkbo using jquery

"> SELECTnameageGenderarea MALE
FEMALE c c++ java submit

          <input type="hidden" name="inc" id="inc" value="0">
        <button id="button" class="btn btn-link" onclick="duplicate()"> add more</button>
        <button id="button" class="btn btn-danger"  onclick="remove()">remove</button>  
        </div>
          </div>