Observe the figure.

a. Which stage of mitosis is indicated in the figure?

b. What is the main change that occurs in this stage?

a. Metaphase stage of mitosis is shown in the figure. During metaphase stage of mitosis, chromosomes get aligned at the equator of cell. Each chromosome is held by spindle fibres at their centromere.

b. During the metaphase stage chromosomes get aligned at the equatorial plane of the cell. The two sister chromatids of a chromosome are held at centromere. Spindle fibres get attached to the centromere of each chromosome. This is the stage where chromosomes are distinctly visible.