Cell Cycle Label - Free Printable
Educational worksheet: Cell Cycle Label. Download and print for classroom or home learning activities.
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Step-by-step solution for: Cell Cycle Label
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Show Answer Key & Explanations
Step-by-step solution for: Cell Cycle Label
The image you've provided illustrates the phases of mitosis, the process by which a eukaryotic cell divides its nucleus and genetic material to produce two genetically identical daughter cells. The diagram shows the sequence of events from Interphase (E) through the four main stages of mitosis: Prophase (A), Metaphase (B), Anaphase (C), and Telophase (D), followed by cytokinesis (the division of the cytoplasm).
Let’s go step-by-step through each phase and identify the labeled parts:
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This is not part of mitosis itself but the preparatory phase before cell division.
- 5. Chromatin: In this phase, DNA is in a loose, uncondensed form called chromatin. It's ready for replication.
- 6. Cell membrane: Outer boundary of the cell.
- 7. Nucleolus: Site of ribosome production; visible during interphase.
- 8. Centrioles: These duplicate during interphase and will help organize the spindle fibers later.
- 10. Nuclear membrane: Surrounds the nucleus and keeps the chromosomes separated from the cytoplasm.
> ✔ During interphase, the cell grows, replicates its DNA, and prepares for division.
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The first stage of mitosis.
- 1. Centriole (aster): Centrioles move to opposite poles of the cell and begin forming spindle fibers.
- 2. Spindle fibers: Microtubules that extend from centrioles and will attach to chromosomes.
- 9. Chromosome: Chromosomes become visible as they condense from chromatin. Each chromosome consists of two sister chromatids joined at the centromere.
> ✔ Key events:
> - Chromatin condenses into chromosomes.
> - Nuclear membrane begins to break down.
> - Spindle apparatus forms.
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Chromosomes line up along the center (equator) of the cell.
- Spindle fibers attach to the centromeres of chromosomes.
- Chromosomes are aligned at the metaphase plate (center of the cell).
> ✔ Key event:
> - Chromosomes are maximally condensed and properly aligned for separation.
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Sister chromatids are pulled apart.
- 3. Chromatids: Now referred to as individual chromosomes after separation.
- Spindle fibers shorten, pulling sister chromatids toward opposite poles.
> ✔ Key event:
> - Sister chromatids separate and move to opposite ends of the cell.
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Final stage of nuclear division.
- Chromosomes arrive at opposite poles and begin to de-condense back into chromatin.
- Nuclear membranes reform around each set of chromosomes.
- Spindle fibers disassemble.
- Centrioles may be visible at each pole.
> ✔ Key events:
> - Two nuclei form.
> - The cell prepares for cytokinesis.
---
After telophase, cytokinesis occurs (not shown in detail here), dividing the cytoplasm and resulting in two genetically identical daughter cells.
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| Number | Label | Description |
|--------|-------------------|-----------|
| 1 | Centriole (aster) | Organizes spindle fibers |
| 2 | Spindle fibers | Pull chromosomes apart |
| 3 | Chromatids | Sister chromatids being pulled apart in anaphase |
| 4 | Daughter cells | Resulting cells after division |
| 5 | Chromatin | Uncoiled DNA in interphase |
| 6 | Cell membrane | Outer boundary of the cell |
| 7 | Nucleolus | Organelle involved in ribosome synthesis |
| 8 | Centrioles | Help form spindle fibers |
| 9 | Chromosome | Condensed DNA structure |
| 10 | Nuclear membrane | Encloses the nucleus |
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Interphase → Prophase → Metaphase → Anaphase → Telophase → Cytokinesis → Two Daughter Cells
This entire process ensures that each daughter cell receives an exact copy of the parent cell’s genetic material.
---
✔ Answer:
The diagram correctly illustrates the stages of mitosis in a eukaryotic cell, showing how chromosomes are duplicated and distributed equally between two daughter cells. The labels accurately identify key structures and phases. This is a standard representation used in biology education to teach cell division.
Let me know if you'd like a simplified version or a quiz based on this!
Let’s go step-by-step through each phase and identify the labeled parts:
---
🔹 E: INTERPHASE
This is not part of mitosis itself but the preparatory phase before cell division.
- 5. Chromatin: In this phase, DNA is in a loose, uncondensed form called chromatin. It's ready for replication.
- 6. Cell membrane: Outer boundary of the cell.
- 7. Nucleolus: Site of ribosome production; visible during interphase.
- 8. Centrioles: These duplicate during interphase and will help organize the spindle fibers later.
- 10. Nuclear membrane: Surrounds the nucleus and keeps the chromosomes separated from the cytoplasm.
> ✔ During interphase, the cell grows, replicates its DNA, and prepares for division.
---
🔹 A: PROPHASE
The first stage of mitosis.
- 1. Centriole (aster): Centrioles move to opposite poles of the cell and begin forming spindle fibers.
- 2. Spindle fibers: Microtubules that extend from centrioles and will attach to chromosomes.
- 9. Chromosome: Chromosomes become visible as they condense from chromatin. Each chromosome consists of two sister chromatids joined at the centromere.
> ✔ Key events:
> - Chromatin condenses into chromosomes.
> - Nuclear membrane begins to break down.
> - Spindle apparatus forms.
---
🔹 B: METAPHASE
Chromosomes line up along the center (equator) of the cell.
- Spindle fibers attach to the centromeres of chromosomes.
- Chromosomes are aligned at the metaphase plate (center of the cell).
> ✔ Key event:
> - Chromosomes are maximally condensed and properly aligned for separation.
---
🔹 C: ANAPHASE
Sister chromatids are pulled apart.
- 3. Chromatids: Now referred to as individual chromosomes after separation.
- Spindle fibers shorten, pulling sister chromatids toward opposite poles.
> ✔ Key event:
> - Sister chromatids separate and move to opposite ends of the cell.
---
🔹 D: TELOPHASE
Final stage of nuclear division.
- Chromosomes arrive at opposite poles and begin to de-condense back into chromatin.
- Nuclear membranes reform around each set of chromosomes.
- Spindle fibers disassemble.
- Centrioles may be visible at each pole.
> ✔ Key events:
> - Two nuclei form.
> - The cell prepares for cytokinesis.
---
🔹 4. Daughter Cells
After telophase, cytokinesis occurs (not shown in detail here), dividing the cytoplasm and resulting in two genetically identical daughter cells.
---
🔎 Summary of Labeled Parts:
| Number | Label | Description |
|--------|-------------------|-----------|
| 1 | Centriole (aster) | Organizes spindle fibers |
| 2 | Spindle fibers | Pull chromosomes apart |
| 3 | Chromatids | Sister chromatids being pulled apart in anaphase |
| 4 | Daughter cells | Resulting cells after division |
| 5 | Chromatin | Uncoiled DNA in interphase |
| 6 | Cell membrane | Outer boundary of the cell |
| 7 | Nucleolus | Organelle involved in ribosome synthesis |
| 8 | Centrioles | Help form spindle fibers |
| 9 | Chromosome | Condensed DNA structure |
| 10 | Nuclear membrane | Encloses the nucleus |
---
🔄 Overall Process Flow:
Interphase → Prophase → Metaphase → Anaphase → Telophase → Cytokinesis → Two Daughter Cells
This entire process ensures that each daughter cell receives an exact copy of the parent cell’s genetic material.
---
✔ Answer:
The diagram correctly illustrates the stages of mitosis in a eukaryotic cell, showing how chromosomes are duplicated and distributed equally between two daughter cells. The labels accurately identify key structures and phases. This is a standard representation used in biology education to teach cell division.
Let me know if you'd like a simplified version or a quiz based on this!
Parent Tip: Review the logic above to help your child master the concept of phases of the cell cycle worksheet.
