What is the definition or description of: brca1 gene?

See below: This is a genetic mutation that puts a person at increased risk for breast and ovarian cancer. It is passed from parent to child with a 50% likelihood. Over a lifetme, people with a brca1 mutation have about a 60% chance of developing breast cancer and a slightly lower risk of developing ovarian cancer.

Prevent cancer: The brca1 gene is a tumor suppressor gene, a gene involved in decreasing the likeliness of developing cancer. A mutation in this gene can increase the likelihood of certain cancers including breast and ovarian cancers. For more information see: http://www.Cancer.Gov/cancertopics/factsheet/risk/brca.

Hereditary Cancer: Mutations in the brca genes lead to a increased risk for breast and ovarian cancer. Patients with mutations in brca have an 80% chance of developing breast cancer and a 40% change of developing ovarian cancer. It is recommended that these patients undergo bilateral mastectomies and also have their ovaries removed once their families are complete.