Age old question: Is genius created by environment or genetics?

Basis of true genius
The question parents frequently ask is can I make my child a genius? How much of my child’s ability comes from genetics and what results from the hours we have worked reading, learning, experiencing? This article in Time magazine, reviewing a new book Genius 101, addresses these questions.
What do you think? Do you feel you have impacted your child’s giftedness by nurturing that ability? Do you think any child could become a genius in the right environment? Or, is giftedness innate?