There are in total 4 chromatin that each have 3 beads (genes) on each end. They are currently inside of the nucleus.

During the interphase the DNA is copied.

The replicated DNA molecules join together to become sister chromatids.

The nucleus dissipates, and spindle fibers appear.

The DNA molecules line up in the middle and they are pulled apart by spindle fibers that have attached itself to them.

The spindle fibers start to disappear.

The cell divides into two.