Question

semester 1 review - unit 2.2
unit 2 instruction sequence 2
sc.912l.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 no answers chosen
anaphase no answers chosen
prophase no answers chosen
telophase no answers chosen
possible answers
spindle fibers attach to the centromeres of the chromosomes sister chromatids are pulled to opposite ends of the cell the spindle forms
chromosomes line up in the cell of the cell chromosomes de - condense nuclear envelope breaks apart nuclear envelope reforms
chromosomes condense spindle breaks down sister chromatids separate at their centromere
centrioles move to opposite ends of the cell

Explanation:

Step1: Analyze Prophase events

In prophase, chromosomes condense, the spindle forms, the nuclear envelope breaks apart, and centrioles move to opposite ends. So the events for prophase are: chromosomes condense, spindle forms, nuclear envelope breaks apart, centrioles move to opposite ends.

Step2: Analyze Metaphase events

Metaphase is when chromosomes line up in the middle (cell equator) and spindle fibers attach to centromeres. So events: chromosomes line up in the cell, spindle fibers attach to centromeres.

Step3: Analyze Anaphase events

Anaphase: sister chromatids separate (pulled to opposite ends by spindle), so events: sister chromatids are pulled to opposite ends, sister chromatids separate at centromere.

Step4: Analyze Telophase events

Telophase: chromosomes de - condense, nuclear envelope reforms, so events: chromosomes de - condense, nuclear envelope reforms, spindle breaks down.

Answer:

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