Summary

In a study published in the journal Science , researchers in Queensland and the United States discovered that the human X chromosome attracts an unusual kind of DNA mutation, potentially doubling the risk of certain genetic disorders, including hemophilia and muscular dystrophy. The study shows that the process of X-chromosome inactivation (XCI)—the natural mechanism ensuring that X chromosome genes are expressed equally in males and females—makes the X chromosome a target for L1 retrotransposons, a type of "jumping gene."

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