14 eggs are insufficient. You need at least 17 eggs to get past the 1% level of significance. And more than 17 is better than only 17.

If those circle backs have a Russo gene paired with a mocha gene (which I will call het Russo/mocha), then breeding any of them to a normal ball python would be expected to produce 50% mocha and 50% het Russo babies. You might want to try such a mating. If any normal babies hatch, then the circle back parent is not a het Russo/mocha.

By the way, alleles are slightly different genes that can form a gene pair. A locus (plural = loci) is the location in the genome where a gene resides. So alleles have the same locus.

Good luck.