Question: My grandmother has gray eyes, her husband has blue-green eyes, their son had dark brown eyes, is this possible 

Answer: Be prepared for answers before you ask questions.  Genetically possible, but not likely (mutations are always possible).  You need to go back one more generation to come up with a solution.\nIn the meantime, try the site below:
This question from the Yahoo Q&A forum is categorized in the topic: Health