BRCA1 gene is located on chromosome:
Mutations in BRCA1 and BRCA2 are responsible for 80% to 90% of "single gene" familial breast cancers and about 3% of all breast cancers. BRCA1 is located on 17q21 BRCA2 is located on chromosome 13q12.
17q21
13q12
12q13
21q17
Breast