Anne Wojcicki, the much-liked biotech analyst who got engaged to Sergey Brin of Google over the holidays, has left her job as an analyst in order to start a personal genetics startup. Wojcicki is one of the founders of 23 and Me, a venture based in Mountain View which promises to make sense of customer's genetic information. Genetic testing for consumers is a field with growth prospects, and Wojcicki wants to "solve medical mysteries and unite the world with DNA", but it's controversial. For instance, imagine if it became standard practice for couples to take genetic tests before marriage.

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