Only certain people have “disease genes”

Mutations in the DNA that everyone of us possesses are what lead to genetic illnesses. For instance, the "breast cancer gene," BRCA1, has received a lot of news attention. In actuality, the BRCA1 gene is present in both males and women. The protein that BRCA1 normally produces aids in the repair of DNA damage. Because their DNA damage is not being repaired effectively, people with a variant of BRCA1 that does not work correctly are more likely to acquire DNA damage over time. The harm could result in cancer.