How common are GMOs?

http://farmandranchfreedom.org/gmo

According to the USDA, in 2007, 91% of soy, 87% of cotton, and 73% of corn grown in the U.S. were GMO. It is estimated that over 75% of canola grown is GMO, and there are also commercially produced GM varieties of sugar beets, squash and Hawaiian Papaya. As a result, it is estimated that GMOs are now present in more than 80% of packaged products in the average U.S. or Canadian grocery store.

Reproduce-Ability

http://www.pleasanthillgrain.com/

Beyond the issue of the quality of the produce, is a matter that looms even larger for many growers... the ability to save and replant seed. Though some hybrid varieties are sterile, many vegetables grown from hybrid seed do produce seed themselves. However, the seed they produce is not genetically like the parent plant. So for purposes of creating another generation of similar plants, hybrid plants do not reproduce themselves. The seed they do produce tends to be weak, with grossly inferior genetics that lack vigor and hardiness and which will produce poorly if at all. So if you want to grow hybrid seed again after the initial crop, you must purchase fresh new seed again from a commercial supplier. In contrast, vegetables grown from open-pollinated heirloom seed produce seed that is genetically identical to the parent seed. By following simple seed-saving guidelines you can grow the same healthy (and healthful) crops, generation after generation, never having to purchase new seed again. And because plants produce much more seed in each generation, your seed supply can be not merely maintained, but rapidly multiplied to produce even more seed for yourself or for others!

All seeds at Clear Creek Seeds are non-GMO (it contains no "genetically modified organisms").

Non-GMO Shopping Guide

This guide from Institute for Responsible Technology helps you avoid foods made with GMO ingredients.  Download the Guide