Which of the following chromosomal and/or genetic abnormalities is/are associated with the development of breast cancer?
A.	Mutations in the p53 tumor suppressor gene
B.	A mutation in the short arm of chromosome 2
C.	The presence of a BRCA 1 gene on chromosome 17
D.	The presence of the BRCA 2 gene on chromosome 13
Answer:A
Which of the following chromosomal and/or genetic abnormalities is/are associated with the development of breast cancer?
A.	Mutations in the p53 tumor suppressor gene B.	A mutation in the short arm of chromosome 2 C.	The presence of a BRCA 1 gene on chromosome 17 D.	The presence of the BRCA 2 gene on chromosome 13