Sure you can!
First, click the menu icon located in the top left corner, and select "Lists":
Click the '+' in the top right-hand corner and select "Find Existing List":
Go through the menu options in order to locate the list you'd like to copy.
Once viewing the list, select the action sheet icon in the top right corner.
And finally, select "Make it My Own"!
From here, simply name and enter description and select the twitter handles you want included in your list.