Can a dogwood tree bloom a different color after it has died and come back from a second growth?

My grandmother is convinced one of her dogwood trees was pink. I died, totaly. She cut it down and the next year is sprouted again. It is now white. I would like to know if it is possible for a dogwood tree to have a second growth a different color.Can a dogwood tree bloom a different color after it has died and come back from a second growth?
If the original tree was a pink tree grafted onto a white rootstock, it would come back white. The same thing happens if you prune a hybrid rose too severly. Now, why did you doubt Granny? You know that the old timers are sharp in the garden.Can a dogwood tree bloom a different color after it has died and come back from a second growth?
Yes -many dogwoods are hybrids-(in that they are like roses). A sturdy root stock of one type is married to a specific flower of another type.This has been going on for at least 300 years! Grafting from one to the other is what I mean't to say.