Question

unit 2: instruction sequence 2
sc.912.l.16.14 describe the cell cycle, including the process of mitosis. explain the role of mitosis in the formation of new cells and its importance in maintaining chromosome number during asexual reproduction.
3
categorization 4 points
correctly match the phases of mitosis to what occurs during them.
metaphase
anaphase
:: chromosomes line up in the cell of the cell
:: spindle fibers attach to the centromeres of the chromosomes
:: sister chromatids are pulled to opposite ends of the cell
:: sister chromatids separate at their centromere
:: centrioles move to opposite ends of the cell
prophase
telophase
:: chromosomes condense
:: the spindle forms
:: nuclear envelope breaks apart
:: spindle breaks down
:: nuclear envelope reforms
:: chromosomes de - condense
possible answers

Explanation:

To solve the mitosis phase - event matching:

1. Prophase: In prophase, the cell starts preparing for division. The centrioles move to opposite ends of the cell (to form the spindle apparatus), the nuclear envelope breaks apart (to allow spindle fibers to interact with chromosomes), chromosomes condense (to become visible and manageable), and the spindle forms (to help move chromosomes). So the events for Prophase are: centrioles move to opposite ends of the cell, nuclear envelope breaks apart, chromosomes condense, the spindle forms.
2. Metaphase: In metaphase, the chromosomes line up in the middle of the cell (at the metaphase plate) and spindle fibers attach to the centromeres of the chromosomes (to prepare for pulling them apart). So the events for Metaphase are: chromosomes line up in the cell, spindle fibers attach to the centromeres of the chromosomes.
3. Anaphase: In anaphase, the sister chromatids separate at their centromere (due to the pulling of spindle fibers) and then the sister chromatids are pulled to opposite ends of the cell. So the events for Anaphase are: sister chromatids separate at their centromere, sister chromatids are pulled to opposite ends of the cell.
4. Telophase: In telophase, the spindle breaks down (as it is no longer needed), the nuclear envelope reforms (to enclose the separated chromosomes), and chromosomes de - condense (to return to their normal, less compact state). So the events for Telophase are: spindle breaks down, nuclear envelope reforms, chromosomes de - condense.

Answer:

• Prophase: centrioles move to opposite ends of the cell, nuclear envelope breaks apart, chromosomes condense, the spindle forms
• Metaphase: chromosomes line up in the cell, spindle fibers attach to the centromeres of the chromosomes
• Anaphase: sister chromatids separate at their centromere, sister chromatids are pulled to opposite ends of the cell
• Telophase: spindle breaks down, nuclear envelope reforms, chromosomes de - condense