From Online Mendelian Inheritance in Man: "Perfect pitch is defined as the ability immediately and effortlessly to name a note or collection of notes when they are sounded.", see http://www.omim.org/entry/159300
There was also one study which linked rs3057 to the presence of the perfect pitch. The publication is Open Access and can be found here: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2706961/?tool=pubmed
Suggested Possible Variations:
* Yes
* No
