Chromosomes are Copied During What Stage of the Cell Cycle

Question

Chromosomes are copied during what stage of the cell cycle?  
A) M
B) D
C) G1
D) G2
E) S

Accepted Answer

Chromosomes are copied during the S (synthesis) phase of the cell cycle. This phase occurs between the G1 (growth) and G2 (gap) phases, and is where DNA replication takes place.