In order for plants and animals to grow and remain healthy, cells need to have the ability to replicate. During cell division, also known as mitosis, the entire DNA content of the cell is copied, with half going to each new cell. DNA is found in a region of the cell called the nucleus, which acts a bit like the brain. This picture shows the nucleus of one of two new daughter cells. The DNA in this cell has somehow become caught, and is being pulled between the two cells. This has caused the DNA to unfold inside the nucleus, and DNA fibres can be seen running through it. As the new cells have moved apart, the tension distributed by the rope-like DNA has deformed the nucleus’s usually circular envelope.
The width of this image is 84 micrometres (0.084 mm).