What do you mean by genetic background. Are you suggesting we get genetic tests done and then mail you our genomes? What part of the genome are you interested in connecting to the body type traits that you will observe?    What and how are you trying to correlate human body phenotypes to?    I'm a cellular biology major and I have had a hard time finding valid connections between behavioral traits and a body's expressed phenotype.    So what exactly is your hypothesis or what are you expecting based on previous work?