* Chromosomes are condensed: During these processes, the DNA in the chromosomes is tightly packed and condensed. This makes them much thicker and easier to see under a microscope.
* Sister chromatids: Before cell division, each chromosome is duplicated, resulting in two identical copies called sister chromatids. These sister chromatids remain attached at a point called the centromere.
* Separation: During mitosis and meiosis, these sister chromatids separate, moving to opposite poles of the cell. This separation process makes the chromosomes highly visible.
In summary: The distinct appearance of chromosomes during cell reproduction is a crucial part of the process, ensuring that each daughter cell receives a complete and accurate set of genetic information.
