You can place Dropdown Lists in cells to allow for data selection. Here is how …

• Position on the cell to receive the dropdown.
  
• Data menu > Validation …
  
• In the Data Validation dialog box, select the Settings Tab
  
• In the Allow: box, select List
  
• For the Source: you can type a list of values separated by commas, or you can select a range of cells where your list has been entered beforehand.
  
• Be sure that In Cell Dropdown is checked
  
• Choose OK

To copy this Dropdown list to other cells…

• Place your pointer on the cell containing the dropdown
• Copy the cell to the clipboard.
• Select the desired cells
• Edit menu > Paste Special…
• In the dialog box, select the Validation radio button, and click OK.

Only the data validation will be pasted in the receiving cells.