In some cases yes, however that depends on the method of installation and maintenance and the thickness of your dreads.
If your dreadlocks have been crocheted, free-formed, or backcombed and are also healthy and relatively thick there is a good chance you can split them without compromising too much of the strength and integrity of the dreadlock.
Alternatively, with twisting, interlocking, or the twist and rip method we generally avoid splitting dreadlocks because there’s a high likelihood of cutting too much hair that holds the dreadlock together resulting in a compromise of integrity and strength of the dreadlock with the possibility of the dread falling off.