Only 1 copy of the Cinny gene would be passed on to each offspring however, ALL the offspring would have the Cinny gene (that's the main benefit of breeding with Supers).

Results would be:

1 in 2 chance per egg of Cinny Pinstripe
1 in 2 chance per egg of Cinny

No normals

To get a Super Cinny Pinstripe you'd need to breed a Cinny Pinstripe to a Cinny for a 1 in 8 chance per egg or a Super Cinny to a Cinny Pinstripe for a 1 in 4 chance per egg.

Chris