css on hover show sub menu code example

Example 1: Dropdown menu HTML

<select id="gender">
  <option value="male"> Male </option>
  <option value="female"> Female</option>
  </select>

Example 2: sub menu disappears on hover css

/* Ensure you use padding instead of margin, the space in between will be filled in */
padding-bottom: 5px;
margin-bottom: 0;