my paper says give an example of a person that has two different genes for genotype (hint: a hybrid)...whats that mean?

Question

First reaad:
http://biology.about.com/bldefhetzyg.htm

Then read:
(Broken Link Removed)

ESPECIALLY SCROLL DOWN TO TONGUE ROLLING (which is a dominant trait)

thanks..im not that heterozygous..im the other h one...ad i cant role my tongue...thank you