Question

mitosis: chromosomes line up
during which phase of mitosis do the chromosomes line up in the center of the cell?
multiple choice
anaphase
metaphase
telophase
prometaphase
prophase

Explanation:

• Anaphase: Sister chromatids separate and move to opposite poles.
• Metaphase: Chromosomes align at the cell's equatorial plane (center of the cell).
• Telophase: New nuclear envelopes form around the separated chromosomes.
• Prometaphase: Nuclear envelope breaks down, and spindle fibers attach to chromosomes.
• Prophase: Chromosomes condense, and the mitotic spindle begins to form.

Since the key event described (chromosomes lining up in the center) is characteristic of metaphase.

Answer:

Metaphase