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Multiple Choice
In what stage of mitosis do chromosomes become visible in the nucleus?
A
Prophase
B
Metaphase
C
Telophase
D
Anaphase
Verified step by step guidance
1
Begin by understanding the process of mitosis, which is the division of a single cell into two genetically identical daughter cells. Mitosis consists of several stages: prophase, metaphase, anaphase, and telophase.
In prophase, the chromatin condenses into visible chromosomes. This is the first stage where chromosomes become visible under a microscope. The nuclear envelope begins to break down, and the mitotic spindle starts to form.
During metaphase, the chromosomes align at the cell's equatorial plane, known as the metaphase plate. This stage is characterized by the alignment of chromosomes rather than their visibility.
In anaphase, the sister chromatids are pulled apart toward opposite poles of the cell. This stage involves the separation of chromatids, not the initial visibility of chromosomes.
Telophase is the final stage of mitosis, where the chromosomes arrive at the poles and begin to de-condense back into chromatin. The nuclear envelope re-forms around each set of chromosomes, completing the process of mitosis.