Question

Early in mitosis, the nucleus, nucleolus, and nuclear envelope begin to dissolve in preparation for cell division. In which stage of the cell cycle is this process reversed?

Answer 1

Mitosis is the process by which a single parent cell divide into two identical daughter cells. The process occurs in five stages, which are: interphase, prophase, metaphase, anaphase and telophase. The processes that occur in the early part of mitosis are usually reversed at the telophase stage, which is the last stage of the process. At the telophase stage, the nuclear membrane and the neucleoi reappear and the chromosome begins to condense.

Answer 2

Answer:

The correct answer would be the telophase of mitosis.

Mitosis or M-phase of the cell cycle is the phase in which actual cell division takes place.

It is sub-divided into four stages:

1. Prophase:

Early prophase:

• Chromosomes start condensing.
• The mitotic spindle fibres initiate to form.
• The nucleus, nucleolus, and nuclear envelop begins to dissolve.

Late prophase or prometaphase:

• The chromosomes are condensed.
• The nucleus, nucleolus, and nuclear envelop are fully dissolved.
• The spindle fibres keep growing and started capturing chromosomes.

2. Metaphase: All chromosomes are aligned at the center forming a metaphase plate. In addition, two kinetochores of each chromosomes are attached to the microtubules extending from opposite spindle fibres.

3. Anaphase: The sister chromatids of the chromosome are pulled towards opposite ends of the cell. Also, the cell elongates which help in division.

4. Telophase: It is exactly opposite to what happens in the prophase. The mitotic spindle break down, nuclear membrane and nucleus reappear, and chromosome again decondense to form chromatin fibres.

Cytokinesis results in the formation of two daughter cells.