Questions: Question 6 (1 point) The spindle poles form and start to move to opposite poles in animal cells during which phase of mitosis? Anaphase Prometaphase Prophase Metaphase

The answer is the third one (Prophase): The spindle poles form and start to move to opposite poles in animal cells during prophase.

Explanation for each option:

• Anaphase: This is the phase where the sister chromatids are pulled apart to opposite poles of the cell. The spindle poles have already moved to opposite ends by this stage.
• Prometaphase: During this phase, the nuclear envelope breaks down, and the spindle fibers attach to the kinetochores of the chromosomes. The spindle poles have already started moving to opposite poles by this stage.
• Prophase: This is the phase where the chromatin condenses into visible chromosomes, and the mitotic spindle begins to form. The spindle poles start to move to opposite poles during this phase.
• Metaphase: In this phase, the chromosomes align at the metaphase plate, equidistant from the two spindle poles. The spindle poles are already at opposite ends by this stage.

Summary: The spindle poles form and start to move to opposite poles in animal cells during prophase.