How it works
A plant cell divides inside its wall, so it stays box-shaped all the way through. The first drawing shows the stages in order, starting with an interphase plant cell labeled with its nucleus and cell wall.
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Plant cell mitosis labeled on a root tip
Cells divide just behind the tip of a growing root, so a stained onion root tip is a common school slide. On the second drawing ten cells are marked. Press Quiz me: a cell lights up and you choose its stage. The root tip cells are the third round.
The third drawing is a plant cell cytokinesis diagram
Vesicles fuse in the middle of the cell to build a cell plate, which becomes the new wall. An animal cell is drawn below it: with no wall, it pinches in at a cleavage furrow.
- One line of chromosomes across the middle is metaphase. Two lines moving apart are anaphase.
Questions and answers
How is mitosis different in a plant cell?
The stages are the same. A plant cell has no centrioles at the ends of its spindle, and it does not pinch in two: it builds a cell plate across the middle, which becomes a new wall.
What does a cytokinesis in plant cells diagram show?
A cell plate forming between the two new nuclei. Vesicles from the Golgi apparatus travel along the microtubules of the phragmoplast and fuse in the middle. The plate grows outward to the side walls and becomes the new cell wall.
What does an interphase cell look like in a root tip?
It has a whole, round nucleus with a nucleolus inside, and no separate chromosomes can be seen. Most cells in the field are in interphase.
Why is a root tip used to study mitosis?
A root grows from a region of dividing cells just behind its tip, so one slide holds cells in several stages.