Answer:
The DNA in chromosomes copies itself ready for mitosis.
Step-by-step explanation:
Interphase is the time during which preparations for mitosis are made. Interphase itself is made up of three phases – G1 phase, S phase, and G2 phase – along with a special phase called G0.
G1 phase is the time during which the cell makes more proteins so that it can grow to its proper size.
S phase, or synthesis phase, is the time during which the cell copies its DNA in preparation for mitosis.
The G2 phase is the time during which a cell replicates its organelles in preparation for mitosis.
Entry into G0 is known as leaving the cell cycle.