Over the past 12 months, a similar gender skew has become apparent around the world. Women have two copies of the X chromosome, says Iwasaki. Write to Jamie Ducharme at jamie.ducharme@time.com. If this proves to be the case, it would not come as a complete surprise. The people in the study ranged in age from babies to the elderly; some 53% were female and 47% were male.
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