Uncovering the Secrets of the X Chromosome

NPR | By Joe Palca

Published March 16, 2005 at 11:00 PM CST

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Scientists expose the X chromosome's complete genetic sequence. New research shows how the X and Y chromosomes evolved from a pair of regular chromosomes 300 million years ago.

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Joe Palca

Joe Palca is a science correspondent for NPR.

See stories by Joe Palca