Why are Allium spp. root cells ideal for studying mitosis?

Allium spp. root cells are ideal for studying mitosis primarily because they are multiplying significantly. This high rate of cell division means that many cells are in the various stages of mitosis at any given time, providing a clear visual representation of the process. The roots of Allium plants, like onions, are actively growing and contain a large number of cells undergoing division, making it easier for researchers and students to observe the different phases of mitosis, such as prophase, metaphase, anaphase, and telophase.

Although the size of the cells might also contribute to visibility under a microscope, the main reason these cells are used is the active division that takes place, allowing for a more comprehensive study of the mitotic process. In contrast, cells that are dormant or inactive do not divide and therefore would not be suitable for observing mitosis.