Effect of dropping class in last semester for transferring to UCs

Hello guys,

How would dropping a class or failing one affect admission decisions for each UC campuses? The major I applied for is mostly bio-related. I would imagine failing a class is more severe than dropping it, so I’m seriously considering dropping a highest-level physics class offered in my college. As a counselor told me at school, most schools shouldn’t have much problem with me dropping the class assuming they already decided to give me an offer, because the class I want to drop is only stated as “major preparation” but not “required for admission”. Does any of you have more information about this? or personal experience?

Thanks in advance!