a 55 to 65 percent chance inherited gene mutation 1 in 400 people mutation in the BRCA1 or BRCA2 gene 1 in 400 people male developing breast cancer according http://ww5.komen.org/Breas.../InheritedGeneticMutations.html Susan G. Komen for the Cure hereditary 1 in 400 people genetics play a role in cancer Inherited Gene Mutations Inherited Gene Mutations BRCA1 or BRCA2 gene mutation ref 1 in 400 people Komen website Inherited Gene Mutations inherited gene mutation Dostupné online. Inherited Gene Mutations mutation in the BRCA1 or BRCA2 gene