Question: is brca1 or 2 more common?
Answer: Like other gene mutations, BRCA1/2 mutations are rare in the general population. In the U.S., about 1 in 400 people have a BRCA1/2 mutation [28]. Prevalence varies by ethnic group. Among Ashkenazi Jewish women and men, about 1 in 40 have a BRCA1/2 mutation [28].