fawk3s

Hi

I cant find the exact answer anywhere. What is the heritance percentage of the disease for children or grandchildren from a male person?
So lets say "granddad" has the disease, what are the chances his grandson will inherit it?

Yes, my grandfather had it, but Im not afraid of the inheritance. Im just interested.
I would also like to know the chances for me being a carrier.

Thanks in advance,
fawk3s