Researchers have found genes that help determine the shapes of fruits and vegetables. Learn how this could (and couldn't) change what you see at the grocery store in today's episode of BrainStuff. Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htmAnd to learn about your ad choices when listening to podcasts, visit https://www.howstuffworks.com/privacy.htm#ad-choices
