How Many Mitosis Stages Are There? Complete Breakdown

How Many Mitosis Stages Are There? The Direct Answer

There are 4 main stages of mitosis: prophase, metaphase, anaphase, and telophase. Most textbooks teach these four. Some break it down into 5 stages by adding prometaphase. Cytokinesis is often listed separately, but it's technically part of the process, not a mitosis stage itself.

That's the short answer. Below is the complete breakdown if you actually need to understand what happens in each stage.

What Mitosis Actually Is

Mitosis is how your cells divide to make identical copies of themselves. One cell becomes two. Two become four. The DNA gets copied, then split equally between the new cells.

Each new cell gets a complete set of chromosomes. That's the whole point.

The 4 (or 5) Stages of Mitosis

1. Prophase

Chromatin (loose DNA) coils up into visible chromosomes. Each chromosome has two identical sister chromatids joined at the centromere.

The mitotic spindle starts forming from microtubules. The nuclear envelope breaks apart.

This stage is where the cell gets organized for division. Things get loud and chaotic inside the nucleus.

2. Prometaphase (The Contested Fifth Stage)

Some sources list this separately. Others lump it into late prophase.

During prometaphase, spindle fibers attach to chromosome centromeres. The nuclear membrane is already gone. chromosomes get grabbed by microtubules and start jostling around the cell.

If your textbook separates these two stages, prophase is the prep work and prometaphase is when the spindle actually grabs hold.

3. Metaphase

Chromosomes line up in the middle of the cell — along the metaphase plate. This is the equator.

Spindle fibers from opposite poles of the cell attach to each chromosome's centromere. Tension pulls from both sides. Every chromosome is in position before the split happens.

This is the stage scientists look at when checking for chromosome abnormalities. Things are perfectly aligned here.

4. Anaphase

The sister chromatids separate and get pulled toward opposite poles of the cell.

Spindle fibers shorten. The cell elongates. Each pole ends up with a complete set of chromosomes.

Once anaphase starts, there's no going back. The split is happening.

5. Telophase

Chromosomes arrive at the poles and start to uncoil back into chromatin. The nuclear envelope reforms around each set of chromosomes.

Spindle fibers break down. The cell is almost two cells now. Two nuclei exist where one used to.

What About Cytokinesis?

People always ask about this. Cytokinesis is the division of the cytoplasm — the actual splitting of the cell membrane.

It usually starts during late anaphase or telophase. In animal cells, a cleavage furrow pinches the cell in two. In plant cells, a cell plate forms down the middle.

Here's the key point: cytokinesis is not technically mitosis. Mitosis refers to chromosome division. Cytokinesis is the separate process that divides the rest of the cell. They happen in tandem, but they're not the same thing.

Quick Comparison Table

How to Remember the Stages

Use IPMAT — the first letters of each stage (excluding cytokinesis if your course counts 4 stages):

• I — Interphase (technically not mitosis, but this is where DNA replicates before division starts)
• P — Prophase
• M — Metaphase
• A— Anaphase
• T — Telophase

Or remember the PMAT sequence without interphase.

If you need to remember what happens in each stage, think of it as a sequence of physical events: the cell prepares (prophase), positions chromosomes (metaphase), splits them (anaphase), and wraps up (telophase).

The Bottom Line

Four stages are standard. Five if your professor counts prometaphase separately. Cytokinesis is the final step that completes cell division but isn't technically part of mitosis.

Check your course material. The number changes depending on how your textbook organizes it.