Today I came across a NOVA scienceNOW episode entitled The Science of Picky Eaters. Wouldn't you know it? Apparently genes do help determine food tastes ;-)
I recommend checking it out if you are interested in such things, it's not too long (just under 13 minutes). The whole show that includes this segment can be found here. And then, feel free to browse the NOVA scienceNOW website for more episodes to watch online!
Update: Please note you may not be able to browse the episodes, in Canada. I keep coming up with no access due to rights restrictions. I'm really annoyed by this. The link, which I got from an American blog site, still seems to allow viewing of The Science of Picky Eaters. So, this post is still valid.