Fact 1: Mutations that lead to cancer usually occur in genes that control the cell cycle.

Fact 2: Mitosis is part of the cell cycle.

Given the two facts above, answer the question "Mutations that lead to cancer usually effect genes that aid in what?" with the following options: 
- illness
 - health
 - disease
 - blood transfer
 - chemotherapy
 - respiraration
 - mitosis
 - recovery


 

       mitosis  