Fact 1: Cancer genes can be inherited.

Fact 2: An inherited mutation is a mistake in the gene.

Given the two facts above, answer the question "Cancer genes can be a what?" with the following options: 
- refract or absorb.
 - mistake in the gene
 - massive damage
 - fault of the protein
 - mistake in the wall
 - purpose of the cell
 - major threat to health
 - a lot of human deaths


 

  mistake in the gene       