NEW YORK (GenomeWeb News) – The stock of Quest Diagnostics this week was downgraded by Zacks Equity Research to Underperform. In a statement, the investment research and information firm noted a drop in Quest's revenues and earnings-per-share for continuing operations in the fourth quarter, as well as a "disappointing outlook" for the first quarter of 2013.

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Polygamy amplified a rare genetic disease in area near Arizona-Utah border, BBC Future reports.

Genetic ancestry testing led one woman to learn that her father and another baby boy had been switched at birth, the Washington Post reports.

Simple de-identification methods can protect information in a database from attackers, a new study suggests.

In Science this week: approach to visualize chromatin structure in nuclei, and more.