Picture of a light microscopical slide that shows the process of cell division in the cells of an onion root: The vertical part of the undifferentiated part of the plant tissue where cells are formed, which is why a lot of cell division happens there.
The cells in the picture are in the different stages of mitosis: The cells of the upper layer are in the interphase (DNA replication). The second layer shows two cells (central) in the prophase, where the DNA condenses to chromosomes and the mitotic spindle is formed).
Below that, there is a cell (second from right) in the early anaphase, where the chromosomes are attached to the spindle and moved towards the opposing poles of the cell, as well as two cells after their division. Some cells seem like having no nucleus, which is caused by the sectional plane, making the nucleus seem invisible or smaller than in other cells.
Credit: Spike Walker, Wellcome Images.
