dranoc,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
</style>
<script>
addEventListener('DOMContentLoaded', function() {
document.querySelectorAll('.radio').forEach(d => d.addEventListener('click', (e, {target} = e) =>
target.type == 'radio' && !d.querySelector('[type="checkbox"]').checked && e.preventDefault()
))});
</script>
</head>
<body>
<div class="radio">
<p><input type="checkbox" value=""> Выбрать</p>
<p><input name="one" type="radio" value="nedzen"> 1</p>
<p><input name="one" type="radio" value="dzen"> 2</p>
</div>
<div class="radio">
<p><input type="checkbox" value=""> Выбрать</p>
<p><input name="two" type="radio" value="nedzen"> 1</p>
<p><input name="two" type="radio" value="dzen"> 2</p>
</div>
</body>
</html>