Question

multiple choice question
during which stage of meiosis ii do a haploid number of chromosomes line up at the equator of each cell?

telophase ii
prophase ii
metaphase ii
anaphase ii

Explanation:

To solve this, we recall the stages of meiosis II:

• Telophase II: Involves nuclear envelope reformation and cell division, not chromosome alignment at the equator.
• Prophase II: Chromosomes condense, spindle forms, but no alignment at equator.
• Metaphase II: Chromosomes (haploid number, as cells are already haploid after meiosis I) line up at the cell's equator (metaphase plate) due to spindle fibers.
• Anaphase II: Sister chromatids separate and move to opposite poles, not alignment.

So the correct stage is Metaphase II.

Answer:

C. Metaphase II (Note: Assuming the options are labeled as A: Telophase II, B: Prophase II, C: Metaphase II, D: Anaphase II. If the original options have different labels, adjust accordingly, but based on the given options, the correct one is the "Metaphase II" option.)