Question

In a biology lab exercise, you are asked to examine cells of a growing onion root tip, that has been sectioned to show many cells. in most of the cells, you easily see the circular or oval nucleus as a uniformly filled space in a membrane outline. in a small percentage of cells, you see chromosomes as distinct strands just as cell division begins, and as it progresses, because the chromatin:

Answer 1

Because the chromatin condenses into compacted chromosomes.

During mitosis, chromatin condenses starting from the prophase to the end of cell division. Condensation of chromatin protects the DNA during cell division and facilitate its mobility and transport.