A new study suggests that transsexualism and gender identity development may be ingrained in our genetic makeup. A DNA analysis of 112 male-to-female transsexuals found that most had a longer version of the androgen receptor gene—a genetic trait that is associated with "less efficient" testosterone signaling.…

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A company in Iceland has developed the first genetic test to assess a woman's risk for the most common forms of breast cancer. The test is performed using a blood sample or cheek swab and measures seven genetic variations that account for about half of the breast cancer cases in the U.S. Women then receive a score…