Final answer:
During the prometaphase stage of mitosis, the nuclear membrane dissolves while the mitotic spindle fibers attach to the sister chromatids' kinetochores. During the prophase stage of mitosis, the nuclear membrane is almost completely dissolved.
Step-by-step explanation:
During the prometaphase stage of mitosis, the nuclear membrane is almost completely dissolved. The mitotic spindle fibers attach to the kinetochores on the individual sister chromatids. During the prophase stage of mitosis, the nuclear membrane is almost completely dissolved. In prophase, chromatin condenses into visible chromosomes, the mitotic spindle begins to form, and the nuclear envelope disintegrates. This dissolution of the nuclear envelope allows the spindle fibers to interact with and eventually separate the duplicated chromosomes during subsequent stages of mitosis.
The mitotic spindle fibers attach to the kinetochores on the individual sister chromatids. This dissolution of the nuclear envelope allows the spindle fibers to interact with and eventually separate the duplicated chromosomes during subsequent stages of mitosis. During the prophase stage of mitosis, the nuclear membrane is almost completely dissolved. In prophase, chromatin condenses into visible chromosomes, the mitotic spindle begins to form, and the nuclear envelope disintegrates.