what breed will they be?

[cresent moon poultry]

I have a flock of barred rock hens and rohde island red roos, what will happen if i hatch there eggs? what will they be?

 

[EggSighted4Life]

The will be black sex links... all males having large white spots on their head at hatch and all females being solid black.

It is a very standard cross and used all the time in hatcheries.

 

[EggSighted4Life]

Also, they won't be considered a "breed"... because if you breed the offspring together... you won't get a repeatable outcome. They are considered a hybrid.

 

[cresent moon poultry]

what happens if a rohde ilsand red rooster mates with a golden wyandotte hen?

 

[EggSighted4Life]

what happens if a rohde ilsand red rooster mates with a golden wyandotte hen?

Here, have fun with this tool... the second drop down tab is in English and you may have to figure out which color you are referring to and it often doesn't account for any leakage of colors... but still good fun with fairly accurate outcomes predicted...
http://kippenjungle.nl/Overzicht.htm#kipcalculator

It says your results would be...
50% Pullets, black patterned red incomplete doublelaced/halfspangled?
50% Cockerels, black patterned red incomplete laced/halfspangled?

I used the golden laced Seabright... in this example it is the most accurate golden laced type of the options available... that is assuming your Wyandotte was golden laced and not just plain golden.