Question

The light micrograph shows dividing cells near the tip of an onion root. Identify a cell in each of the following stages: prophase, metaphase, anaphase, and telophase. Describe and list the major events occurring at each stage.

Answer 1

Mitotic division in onion root cells:

1. Prophase: the emergence of chromatin threads that form chromosomes, the chromosomes are visible and overlap.
2. Metaphase: chromosomes line up and line up in the middle of the equatorial plane. The centromere of the chromosome appears to have bonds with the kinetochores connected to the spindle threads.
3. Anaphase: the centromere of the chromosome undergoes division then the chromosomes are pulled by the spindle threads towards the two opposite poles and leave the center of the equator that looks empty.
4. Telophase: The cytoplasm divides into two identical-looking daughter cells. At the telophase stage, the process of cell division occurs in two parts and has identical properties.

Mitosis is a cell division through the stages of prophase, metaphase, anaphase, and telophase. The purpose of mitosis is for growth and regeneration which results in two daughter cells that are identical to the original parent cell. Mitosis occurs only once and lasts only during somatization.

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