Variegated in my experience seems to be co-dominant. All of my variegated animals produce some variegated animals no matter who I pair them with.
As for that male, I'm not breeding him. I am trying to find a home for him actually. So, he won't be making any babies for me. His sister will, LOL, but not him. I really can't use a rex male in my breeding program. His genes spread too fast and I just can't use that many rex animals. So, I only breed rex females.