During this phase of the cell cycle, homologous chromosomes line up at the equator of the cell

Question

BlackTom AI · Accepted Answer

The question asks: During this phase of the cell cycle, homologous chromosomes line up at the equator of the cell.

Option presented: Metaphase.

To analyze, recall that metaphase is a stage in both mitosis and meiosis where chromosomes align at the cell's equatorial plane. However, there is a crucial distinction: in mitosis (normal somatic cell division), individual replicated chromosomes line up single-file at the metaphase plate. In contrast, during meiosis I, homologous chromosomes (each consisting of two sister chromatids) pair up to form tetrads and then align at the metaphase plate as homologous pairs, not as individual chromosomes.

Because the statement specifies homologous chromosomes lining up at the equator, this is characteristic of metaphase I of meiosis, where homologous pairs align in preparation for separation.

Given that the provided option is Metaphase, we should consider the nuance:
- If the course or question intends a general metaphorical/metaphase description without specifying meiosis vs. mitosis, Metaphase might be treated as the broad term for the stage where chromosomes align at the equator.
- If the intended answer differentiates between mitosis and meiosis, the precise term for this event would be Metaphase I (not Metaphase II or Metaphase in mitosis).

In terms of reasoning about the statement itself, the key misconception that could arise is conflating mitotic metaphase with the meiotic arrangement of homologous chromosomes. Misunderstanding would lead someone to answer Metaphase as if it were meiosis II or mitosis, where the arrangement is different (in mitosis, individual chromosomes align; in meiosis I, homologous pairs align).

If one were to critique the given option directly:
- Strength: It identifies a phase where chromosomes align at the equator, which is partially accurate for mitosis. 
- Limitation: It does not capture the meiosis-specific context of homologous chromosomes aligning as pairs (tetrads) in Metaphase I, which is the precise description for the prompt.

Thus, the statement in the question aligns most closely with the meiotic event Metaphase I, even though the provided option is Metaphase alone. The remaining analysis highlights that a more precise term would be Metaphase I to distinguish from metaphase in mitosis or other meiosis phases.

01:447:380:17 GENETICS Recitation 6 Quiz_Sp2025

During this phase of the cell cycle, homologous chromosomes line up at the equator of the cell

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