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Multiple Choice
Which of the following events does not occur during prophase?
A
Sister chromatids separate
B
The mitotic spindle begins to form
C
Chromosomes condense and become visible
D
The nuclear envelope breaks down
Verified step by step guidance
1
Understand the key events that occur during prophase of mitosis. Prophase is the first stage of mitosis where several important processes take place.
Recognize that during prophase, chromosomes condense and become visible under a microscope. This is a crucial step as it prepares the chromosomes for segregation.
Note that the mitotic spindle begins to form during prophase. The spindle fibers are essential for separating the chromosomes later in mitosis.
Identify that the nuclear envelope breaks down during prophase, allowing the spindle fibers to interact with the chromosomes.
Understand that the separation of sister chromatids does not occur during prophase. This event actually takes place during anaphase, which is a later stage of mitosis.