Quote : Any cutting taken from a "hybrid" rose bush may produce a different rose than the adult plant, as several cuttings are used to make the adult plant. They are grafted onto root stock. So you could end up with one of several colors. If it's a really old bush (I have a climber that is over 100 years old) they are on original root & not grafted onto root stock. Those should produce the same plant.
This is not accurate. Hybrid roses ARE grafted onto a rootstock..but only one variety at a time...there are exceptions..I have seen novelty roses with a couple colors grafted onto them..but even in that case, what you see is what you get...if it blooms white, so will the cutting...I think the poster has this issue confused with hybridizing, and that an entirely different issue...but for cuttings...they will ALWAYS be the same exact plant that you took them from, color and growth habit..a bush will stay a bush, a climber will always be a climber, red will be red..etc.