Multiple Choice
During which phase of mitosis do chromosomes condense and become visibly distinct under a light microscope?
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16. Cell Division
Mitosis
Multiple Choice
During prophase of mitosis, which of the following events occurs?
A
Nuclear envelopes re-form around each set of chromosomes and chromosomes decondense.
B
Sister chromatids separate and move toward opposite poles of the cell.
C
Sister chromatids align at the cell's equator (metaphase plate).
D
Chromatin condenses into visible chromosomes and the mitotic spindle begins to form.
Verified step by step guidance1
Understand the stages of mitosis and the key events that characterize each phase: prophase, metaphase, anaphase, and telophase.
Recall that during prophase, chromatin (the uncondensed form of DNA) condenses into visible chromosomes, making them easier to separate later.
Recognize that the mitotic spindle, a structure made of microtubules, begins to form during prophase to help segregate chromosomes.
Note that nuclear envelope breakdown also occurs during prophase, allowing spindle fibers to interact with chromosomes.
Differentiate prophase from other stages: for example, sister chromatids align at the metaphase plate during metaphase, and sister chromatids separate during anaphase.
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