Question

Individual chromosomes become distinct through a compound microscope during this mitotic stage.
A. Prophase
B. Prometaphase
C. Metaphase
D. Anaphase

Answer 1

Hint:
Mitosis is a cell division in which a single cell divides into two identical daughter cells with the same number of chromosomes. Mitotic cell division takes place in somatic cells. It occurs in four different stages such as prophase, metaphase, anaphase, and telophase.

Complete step by step answer:
Prophase is the initial stage of mitosis where chromatins condensed to become chromosomes. So these condensed chromosomes can be visible through a compound microscope. Mitotic spindles start to appear which helps in the arrangement of chromosomes. Centrosomes start to move in the opposite direction.
During prometaphase, nuclear condensation gets over and the nuclear membrane begins to break down. Spindle fibres start attaching to the kinetochores of chromosomes.
During metaphase, all the chromosomes align in the middle portion forming a metaphase plate. Centromeres are completely moved at the opposite ends of the cell. During this stage the cell checks for the proper alignment of all the chromosomes with kinetochores in the center.
During the anaphase stage, the sister chromatids are moved in the opposite direction of the cell. The spindle fibers become contracted to break the chromosomes and move them toward both poles.
During the last stage called telophase, the cell elongates and the formation of two nuclei can be seen. Decondensation of chromosomes begins and mitotic spindle fibers are broken down.

Option ‘A’ is correct

Note:
The cells undergo cytokinesis after completing all four stages of mitosis. Here the cytoplasm undergoes division to form two new cells. Actin ring pinches the cytoplasm along a crease known as cleavage furrow which helps in the splitting of two daughter cells.