<!DOCTYPE html>
<html>
<head>
<title>Title of the Document</title>
<script src="https://code.jquery.com/jquery-3.5.0.min.js"></script>
</head>
<body>
<div id="checkList">
<input id="checkbox1" type="checkbox" name="one" value="1" />
</div>
<input type="button" id="btnCheck" value="Check" />
<input type="button" id="btnUnCheck" value="UnCheck" />
<script>
$('#btnCheck').on('click', function() {
$('#checkbox1').get(0).checked = true;
});
$('#btnUnCheck').on('click', function() {
$('#checkbox1').get(0).checked = false;
});
</script>
</body>
</html>