The 'good genes' explanation is too easy. Genius is 90% sweat, according to Einstein.
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There was a time when almost all great violinists were Jewish. Determination and endless practice brought that about. Now we have some Asian violin geniuses who sweat rivers to become the best.
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The MVP in the NBA is a short (6'3") guy who is neither black nor American. He is the best because he put a lot of work and desire into his play. (Steve Nash).
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In any case, the Jews are very special and have been very generous to mankind with their achievements.
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http://www.yahoodi.com/famous/index.html