Final answer:
Genetic factors play a significant role in the development of certain cancers, including breast cancer.
Step-by-step explanation:
Some diseases, such as breast cancer, can be traced to genetic factors in addition to environmental hazards. Genetic factors play a significant role in the development of certain cancers, including breast cancer. Mutant genes, such as BRCA1 and BRCA2, can greatly increase the risk of breast and ovarian cancer in women.