如何删除显示所选值？

Question

选择值似乎显示在下拉列表上方。我如何摆脱它？

<div class="col-md-3" align="center" style="padding: 1px;">
    <select id="gender">
        <option value="Gender" selected="" disabled="">Gender</option>
        <option value="Male">Male</option>
        <option value="Female">Female</option>
    </select>
</div>

screenshot of the output