Question

Prophase ends and _____ begins when the rapid phosphorylation of the nuclear lamina triggers the breakdown of the nuclear envelope and the microtubules gain access to the chromosomes.

Answer 1

Prometaphase follows prophase in mitosis, characterized by the breakdown of the nuclear envelope and spindle fiber attachment to kinetochores on chromosomes.

Step-by-step explanation:

The stage that follows prophase in mitosis is known as prometaphase. This phase begins when the rapid phosphorylation of the nuclear lamina leads to the breakdown of the nuclear envelope, which allows microtubules to access the chromosomes.

During prometaphase, the remnants of the nuclear envelope fully disappear, and mitotic spindle fibers attach to kinetochores that are formed on the chromosomes. This prepares the chromosomes to be aligned at the cell's equatorial plate during the subsequent phase, metaphase.