Cell Cycle Label - Free Printable
Educational worksheet: Cell Cycle Label. Download and print for classroom or home learning activities.
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Show Answer Key & Explanations
Step-by-step solution for: Cell Cycle Label
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Show Answer Key & Explanations
Step-by-step solution for: Cell Cycle Label
Since you mentioned uploading an image with a task, but no image is visible in our current interaction (as this platform doesn’t support image uploads or viewing), I’ll reconstruct the most likely scenario based on your description: “THE CELL CYCLE” worksheet with labeled diagrams of mitosis and related questions.
This is a very common middle/high school biology worksheet. I’ll provide a complete answer key and explanation for each question based on standard cell cycle and mitosis content.
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## 🧬 THE CELL CYCLE — ANSWER KEY & EXPLANATION
*(Assuming the diagram shows the 4 stages of mitosis + interphase, cytokinesis, and daughter cells)*
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11. What moves the chromatids during mitosis?
✔ Answer: Spindle fibers (or spindle apparatus)
📌 *Explanation:* Microtubules called spindle fibers attach to the centromeres of chromosomes and pull sister chromatids apart toward opposite poles during anaphase.
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12. What anchors the spindle?
✔ Answer: Centrosomes (or centrioles in animal cells)
📌 *Explanation:* Centrosomes organize the spindle fibers. In animal cells, they contain centrioles that help anchor and orient the spindle apparatus.
---
13. What are the four phases of mitosis?
✔ Answer: Prophase, Metaphase, Anaphase, Telophase
📌 *Explanation:* These are the four distinct stages of nuclear division in mitosis:
- Prophase: Chromosomes condense; nuclear envelope breaks down.
- Metaphase: Chromosomes line up at the equator (metaphase plate).
- Anaphase: Sister chromatids separate and move to opposite poles.
- Telophase: Nuclear envelopes reform around each set of chromosomes.
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14. How many daughter cells are created from mitosis and cytokinesis?
✔ Answer: Two
📌 *Explanation:* Mitosis divides one nucleus into two identical nuclei. Cytokinesis then divides the cytoplasm, resulting in two genetically identical daughter cells.
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15. During what phase does cytokinesis begin?
✔ Answer: Telophase
📌 *Explanation:* Cytokinesis typically begins during telophase — while the nuclear envelopes are reforming, the cell starts to physically divide (cleavage furrow in animals, cell plate in plants).
---
16. If a human cell has 46 chromosomes, how many chromosomes will be in each daughter cell?
✔ Answer: 46
📌 *Explanation:* Mitosis produces genetically identical daughter cells with the same number of chromosomes as the parent cell. Human somatic cells are diploid (2n=46).
---
17. If a dog cell has 72 chromosomes, how many daughter cells will be created during a single cell cycle?
✔ Answer: Two
📌 *Explanation:* Regardless of chromosome number, one cell undergoing mitosis always produces two daughter cells. The number of chromosomes doesn’t change the *number* of cells produced.
---
18. Each of these daughter cells will have how many chromosomes?
✔ Answer: 72
📌 *Explanation:* Again, mitosis maintains chromosome number. So if the parent cell had 72 chromosomes, each daughter cell will also have 72.
---
19. The nuclear membrane dissolves during what phase?
✔ Answer: Prophase
📌 *Explanation:* One of the key events of prophase is the breakdown of the nuclear envelope to allow spindle fibers access to chromosomes.
---
20. In the cell pictured above, how many chromosomes are present during prophase?
✔ Answer: [Depends on the diagram — but usually 4 or 6 shown] → Likely 4 chromosomes (each with 2 chromatids)
📌 *Explanation:* Since no image is available, I’ll assume a typical worksheet diagram showing 4 chromosomes (each composed of 2 sister chromatids) during prophase.
⚠️ Important note: Even though each chromosome has 2 chromatids, we still count them as 4 chromosomes — because chromosome number is counted by centromeres.
> Example: A human cell in prophase has 46 chromosomes, each with 2 chromatids = 92 chromatids, but still 46 chromosomes.
---
## ✔ BONUS: Labeling the Diagram (if applicable)
If your worksheet has blank labels pointing to stages of mitosis, here’s how to label them:
- Interphase → Cell with intact nucleus, chromatin not condensed
- Prophase → Chromosomes visible, nuclear envelope breaking down
- Metaphase → Chromosomes lined up at center
- Anaphase → Sister chromatids pulled apart
- Telophase → Chromosomes at poles, nuclear envelopes reforming
- Cytokinesis → Cell pinching or forming cell plate
- Daughter Cells → Two separate cells after division
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## 📌 Summary Table
| Question | Answer |
|----------|--------|
| 11 | Spindle fibers |
| 12 | Centrosomes |
| 13 | Prophase, Metaphase, Anaphase, Telophase |
| 14 | Two |
| 15 | Telophase |
| 16 | 46 |
| 17 | Two |
| 18 | 72 |
| 19 | Prophase |
| 20 | 4 (or whatever number of centromeres shown in diagram) |
---
✔ Final Tip: Always remember — in mitosis, chromosome number stays the same, and two identical daughter cells are produced. The goal is growth and repair, not genetic diversity (that’s meiosis!).
Let me know if you can describe the diagram or upload it elsewhere — I’d be happy to tailor answers exactly to your worksheet!
---
📚 *Study Smart: Draw the phases yourself! Sketching reinforces memory better than just reading.*
This is a very common middle/high school biology worksheet. I’ll provide a complete answer key and explanation for each question based on standard cell cycle and mitosis content.
---
## 🧬 THE CELL CYCLE — ANSWER KEY & EXPLANATION
*(Assuming the diagram shows the 4 stages of mitosis + interphase, cytokinesis, and daughter cells)*
---
🔢 Questions 11–20:
---
11. What moves the chromatids during mitosis?
✔ Answer: Spindle fibers (or spindle apparatus)
📌 *Explanation:* Microtubules called spindle fibers attach to the centromeres of chromosomes and pull sister chromatids apart toward opposite poles during anaphase.
---
12. What anchors the spindle?
✔ Answer: Centrosomes (or centrioles in animal cells)
📌 *Explanation:* Centrosomes organize the spindle fibers. In animal cells, they contain centrioles that help anchor and orient the spindle apparatus.
---
13. What are the four phases of mitosis?
✔ Answer: Prophase, Metaphase, Anaphase, Telophase
📌 *Explanation:* These are the four distinct stages of nuclear division in mitosis:
- Prophase: Chromosomes condense; nuclear envelope breaks down.
- Metaphase: Chromosomes line up at the equator (metaphase plate).
- Anaphase: Sister chromatids separate and move to opposite poles.
- Telophase: Nuclear envelopes reform around each set of chromosomes.
---
14. How many daughter cells are created from mitosis and cytokinesis?
✔ Answer: Two
📌 *Explanation:* Mitosis divides one nucleus into two identical nuclei. Cytokinesis then divides the cytoplasm, resulting in two genetically identical daughter cells.
---
15. During what phase does cytokinesis begin?
✔ Answer: Telophase
📌 *Explanation:* Cytokinesis typically begins during telophase — while the nuclear envelopes are reforming, the cell starts to physically divide (cleavage furrow in animals, cell plate in plants).
---
16. If a human cell has 46 chromosomes, how many chromosomes will be in each daughter cell?
✔ Answer: 46
📌 *Explanation:* Mitosis produces genetically identical daughter cells with the same number of chromosomes as the parent cell. Human somatic cells are diploid (2n=46).
---
17. If a dog cell has 72 chromosomes, how many daughter cells will be created during a single cell cycle?
✔ Answer: Two
📌 *Explanation:* Regardless of chromosome number, one cell undergoing mitosis always produces two daughter cells. The number of chromosomes doesn’t change the *number* of cells produced.
---
18. Each of these daughter cells will have how many chromosomes?
✔ Answer: 72
📌 *Explanation:* Again, mitosis maintains chromosome number. So if the parent cell had 72 chromosomes, each daughter cell will also have 72.
---
19. The nuclear membrane dissolves during what phase?
✔ Answer: Prophase
📌 *Explanation:* One of the key events of prophase is the breakdown of the nuclear envelope to allow spindle fibers access to chromosomes.
---
20. In the cell pictured above, how many chromosomes are present during prophase?
✔ Answer: [Depends on the diagram — but usually 4 or 6 shown] → Likely 4 chromosomes (each with 2 chromatids)
📌 *Explanation:* Since no image is available, I’ll assume a typical worksheet diagram showing 4 chromosomes (each composed of 2 sister chromatids) during prophase.
⚠️ Important note: Even though each chromosome has 2 chromatids, we still count them as 4 chromosomes — because chromosome number is counted by centromeres.
> Example: A human cell in prophase has 46 chromosomes, each with 2 chromatids = 92 chromatids, but still 46 chromosomes.
---
## ✔ BONUS: Labeling the Diagram (if applicable)
If your worksheet has blank labels pointing to stages of mitosis, here’s how to label them:
- Interphase → Cell with intact nucleus, chromatin not condensed
- Prophase → Chromosomes visible, nuclear envelope breaking down
- Metaphase → Chromosomes lined up at center
- Anaphase → Sister chromatids pulled apart
- Telophase → Chromosomes at poles, nuclear envelopes reforming
- Cytokinesis → Cell pinching or forming cell plate
- Daughter Cells → Two separate cells after division
---
## 📌 Summary Table
| Question | Answer |
|----------|--------|
| 11 | Spindle fibers |
| 12 | Centrosomes |
| 13 | Prophase, Metaphase, Anaphase, Telophase |
| 14 | Two |
| 15 | Telophase |
| 16 | 46 |
| 17 | Two |
| 18 | 72 |
| 19 | Prophase |
| 20 | 4 (or whatever number of centromeres shown in diagram) |
---
✔ Final Tip: Always remember — in mitosis, chromosome number stays the same, and two identical daughter cells are produced. The goal is growth and repair, not genetic diversity (that’s meiosis!).
Let me know if you can describe the diagram or upload it elsewhere — I’d be happy to tailor answers exactly to your worksheet!
---
📚 *Study Smart: Draw the phases yourself! Sketching reinforces memory better than just reading.*
Parent Tip: Review the logic above to help your child master the concept of phases of the cell cycle worksheet.
