Question about Gr and gf genes

[celticman]

I have been growing tomatoes for several years. And I actually managed to cross brandywine and barndy boy (mainly to learn the techneque 8) I still need a lot of practice I took eight tries to make it work )

My understanding of tomatoe genetic is highly limited and I am trying figuire it out so if I were to cross Aunt Ruby's Green (gf and rr)and Cherokee Green (Gr) would I end up with Yellow tomatoes with a red interior ie containing Gr and rr

I gues what I am asking is if you cross Cherokee Green with an Brown/Purple/Black you get ?
with an Green you get?
with a yellow/white you get?
I could see some very intersting long term plant breeding possiblities and reasons to grow lots of tomatoes (not that a need more reasons)
Tim