Yup, most bikes sell with wheels that detach unless you are talking about super cheap (under $300 maybe?) or specific duty bikes with beefier gear (over $3000)
But those trends change from time to time.
Just ask for a bike with wheels that are 9mm Quick Release equipped. Should be pretty standard.
Now is the time to work on your fitness level by the way... you know, for those races you'll be participating in come the summertime!