Mutations that lead to cancer usually occur in genes that control the cell cycle.
Cancer is an example of a mutation in cells.
A mutation in cells usually occur in genes that control the cell cycle.
What usually occur in genes that control the cell cycle?

A. Leptospirosis
B. competition
C. A Greek letter
D. a mutation in cells
E. Plant reproduction
F. biological diversity
G. resistance
H. resistance activities