That's a great question Sj541! With a 1-Park per Day Ticket, you can choose to visit either Disneyland Park or Disney California Adventure Park. Keep in mind that you can't visit both parks in one day. However, you can choose what park you would like to enter in each day.
Because you only have a limited amount of time in the Parks, I would highly recommend upgrading your tickets to Park Hopper passes. This way, you can experience all of the magic the Disneyland Resort has to offer, without having to choose what park to visit.
I hope this helps! If you want to book discounted Disneyland tickets or upgrade your ticket, feel free to visit us at getawaytoday.com or call one of our travel experts at 855-GET-AWAY.