A new study in the American Journal of Human Genetics has performed the first whole-genome linkage scan for synesthesia, which is known to run in families and to affect women more than it does men. Researchers found four candidate regions on chromosomes 2q24, 5q33, 6p12, and 12p12, and revealed that the disease, in which sounds are perceived as colors, is not X-linked as was previously thought.

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In Nature this week: Icelandic genome sequences, approach to increase CRISPR efficiency, and more.

Testing showing "genetic incompatibilities" have led thousands of couples in Saudi Arabia to call off their weddings, the BBC reports.

Decode Genetics' ability to tell Icelanders, even ones the company hasn't sequenced, about their disease risk brings up ethical questions.

Genetic analysis of Britain's King Richard III and modern descendants of his relatives indicate breaks in the male line.