In which stage is the structure of chromosomes most clearly visible?

Identify the phase of mitosis shown in the figure.

During anaphase,the chromatids move towards the poles due to which of the following?

Statement $P$ : Small disc-shaped structures called kinetochores are present on the surface of the centromeres.
Statement $Q$ : Spindle fibers attach to the centromeres of the chromosomes.

The first phase of mitosis which follows interphase is

Describe the various phases of mitosis in detail with a diagram.