One of my biggest fears is getting cancer one day. Especially when 5-10 percent can come from inherited genes.
Yes, the thought of cancer scares me too, I knew it had a genetic connection, but wasn't sure how much.
The BRCA2 gene is one of them,  it's responsible for repairing DNA but is susceptible to turning cancerous.
Does it cause a variety of cancers, or specific ones?
It mainly is found in breast tissue, so it is breast cancer.
Well, definitely scary for a woman to find out. Are there other genes like that?
No, but a self breast exam and feeling the breast for lumps reguarly can catch any cancer early. 
Well, I agree it is something all women over a certain age should do, just as men should do examinations