WIRED Staff
Science

Slideshow: Why X Marks the Gender

Recent revelations about the genetic makeup and peculiarities of the X chromosome promise to illuminate some of the differences between the sexes. By Rowan Hooper.
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An electron micrograph shows the Y chromosome (on the left) and the X.Courtesy of Indigo Instruments

See related story: Why X Marks the Gender

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Mark Ross leads the X Chromosome Project at the Wellcome Trust Sanger Institute.

Courtesy of Wellcome Trust medical photographic library
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In this image of male human chromosomes, DNA "paint" identifies sequences on the X chromosome -- and on the tip of the Y -- as yellow.

Courtesy of Dr. Nigel Carter