Here's a breakdown of why:
* Prophase: This is the first and longest phase of mitosis. During prophase, the replicated chromosomes condense, becoming visible as distinct structures. This condensation allows the chromosomes to be easily separated during later stages of mitosis.
* Other phases: While chromosomes are present throughout the cell cycle, they are not visible as distinct structures during other phases. In interphase, the DNA is in a less condensed state, known as chromatin. During metaphase, anaphase, and telophase, the chromosomes are already condensed and visible but are undergoing specific processes like alignment, separation, and decondensation.
Let me know if you'd like to learn more about any of these phases!
