I just wanted to point out that the above statement is not necessarily correct. Heterozygous does not mean carrying but not expressing. Literally it means that the animal is only carrying one copy of the allele. Now in referrence to the trait in question (Pied), it is a recessively inhereted gene. Therefore a Het Pied carries one allele, and is not visably different from a Normal. If, however, we were discussing dominantlinhereted traits, the Heterozygous form is different than a normal. 99% of all Spiders in the Ball Python world are Heterozygous, but they surely don't look normal.
I just wanted to clarify for the original poster, as they seem new to this and trying to learn. I didn't want them misunderstanding from the get go.