"technically" yes, however, in reality, most of your braking on the street is going to be with the front. when you apply the brakes, the wieght of the bike and rider gets shifted forward, which takes weight off the rear wheel, and makes it easier to lock up. since weight is being applied to the front wheel, you can use a significant amount of front brakes before they'll ever lock up.

the main thing to remember is to use smooth inputs. jerky actions on a motorcycle, in general, will upset the chassis, and make the ride do funny things undernieth you at best, and put you on your butt, at worst.