Can my mom still claim me as a dependent even if i file my own taxes?

Hi, I am currently a 20 year old full time college student and filing taxes for the first time.  I was employed through workstudy and didn't provide more than half of my own support during the year and was wondering if filing my own taxes affects my seperated mom's ability to file me as a dependent? I'm also aware of "The American Opportunity Credit," but noted that I may not take the credit for myself if I was claimed as someone else's dependent; if my mom can claim me as a dependent, will she still be able to claim that credit if I file my own taxes?