In a far-reaching judgment that could have major implications for the biotech industry, a federal judge in Manhattan has struck down patents related to two human genes linked to hereditary breast and ovarian cancers, BRCA1 and BRCA2. Myriad Genetics held the patents, and women who want to find out if they have a high genetic risk for these cancers have to get a test sold by Myriad, which costs more than $3,000.