What do you mean by prophase in mitosis?

Prophase in mitosis is the first stage of the cell cycle during which chromosomes condense into chromatin. There are three main stages: interphase, prophase, and metaphase. During metaphase, two molecules called kinetochores attach to centromeres on opposite ends of the chromosome, forming a spindle that separates the sister chromatids. For example, with two sets of DNA strands emerging from one set of nuclei; each strand is composed of two chains joined at their 5' ends but separated at their 3' ends by a protein bridge (the spindle). The centrosomes then attach to either side of the spindle and initiate microtubule assembly.

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In mitosis, prophase is the first stage of the cell cycle, when chromosomes condense into chromatin. Interphase, prophase, and metaphase are the three primary phases. Two or more molecules called kinetochores to connect to centromeres on opposing ends of the chromosome during metaphase, generating a spindle that divides the sister chromatids. Two sets of DNA strands emerge from one set of nuclei, for example; each strand is made up of two chains that are connected at their 5' ends but divided at their 3' ends by a proteins bridge (the spindle). After that, the centrosomes adhere to either end of the spindle and begin microtubule assembly.