Are there particular genes involved in breast cancer?

Yes: There are 2 gene mutations, brca1 and brca2, which have been discovered and which substantially increase one's risk of getting breast cancer. Since breast cancer tends to run in families, there are probably many other gene mutations which haven't been discovered yet. But most women who get breast cancer do not have a family history, so it is likely that there are other factors besides genes.

Yes: While the majority of breast cancer is unrelated to the known breast cancer causing genes. About 11% of breast cancer is due to mutation in one of two genes called brca 1 and brca 2. Women having a mutation in these genes are at a higher risk for developing breast and ovarian cancer.