are brca1 and brca2 hereditary?
BRCA1 and BRCA2 (BRCA1/2) gene mutations. Everyone has BRCA1 and BRCA2 genes. Some people have an inherited mutation in one or both of these genes that increases the risk of breast cancer. BRCA1/2 mutations can be passed to you from either parent and can affect the risk of cancers in both women and men.