Comparing Mitosis Meiosis - Answer KEY - ENG 4025 - Studocu - Free Printable

The worksheet titled "Comparing Mitosis and Meiosis" asks you to determine whether each listed characteristic applies to mitosis, meiosis, or both by placing a checkmark (X) in the appropriate column. The answers provided on the sheet are mostly correct, but let's go through each one with explanations to ensure accuracy and understanding.

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✔ Correct Answers & Explanations

| # | Characteristic | Mitosis | Meiosis | Explanation |
|---|----------------|---------|---------|-----------|
| 1 | No pairing of homologs occurs | ✔ | | In mitosis, homologous chromosomes do not pair up. In meiosis, homologs do pair during prophase I (synapsis). |
| 2 | Two divisions | | ✔ | Meiosis has two divisions: Meiosis I and Meiosis II. Mitosis has only one division. |
| 3 | Four daughter cells produced | | ✔ | Meiosis produces four haploid daughter cells. Mitosis produces two diploid daughter cells. |
| 4 | Associated with growth and asexual reproduction | ✔ | | Mitosis is responsible for growth, repair, and asexual reproduction. Meiosis is for gamete formation. |
| 5 | Associated with sexual reproduction | | ✔ | Meiosis produces gametes (sperm and egg), which are used in sexual reproduction. |
| 6 | One division | ✔ | | Mitosis involves one nuclear division. Meiosis involves two. |
| 7 | Two daughter cells produced | ✔ | | Mitosis results in two genetically identical daughter cells. Meiosis produces four. |
| 8 | Involves duplication of chromosomes | ✔ | ✔ | Both processes involve DNA replication (chromosome duplication) before division starts (in interphase). |
| 9 | Chromosome number is maintained | ✔ | | In mitosis, the chromosome number remains the same (diploid → diploid). In meiosis, it is halved (diploid → haploid). |
| 10 | Chromosome number is halved | | ✔ | Only in meiosis does the chromosome number go from diploid (2n) to haploid (n). |
| 11 | Crossing over between homologous chromosomes may occur | | ✔ | Crossing over occurs in prophase I of meiosis, not in mitosis. |
| 12 | Daughter cells are identical to parent cell | ✔ | | In mitosis, daughter cells are genetically identical to the parent cell. In meiosis, they are genetically different due to crossing over and independent assortment. |
| 13 | Daughter cells are not identical to parent cell | | ✔ | Meiosis produces genetically diverse gametes. Mitosis produces clones. |
| 14 | Produces gametes | | ✔ | Meiosis produces gametes (sperm and eggs). Mitosis does not. |
| 15 | Synapsis occurs in prophase | | ✔ | Synapsis (pairing of homologous chromosomes) happens in prophase I of meiosis. It does not occur in mitosis. |

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🔍 Summary of Key Differences

| Feature | Mitosis | Meiosis |
|--------|--------|--------|
| Number of divisions | 1 | 2 |
| Daughter cells | 2 | 4 |
| Genetic identity | Identical | Genetically diverse |
| Chromosome number | Maintained (2n → 2n) | Halved (2n → n) |
| Purpose | Growth, repair, asexual reproduction | Sexual reproduction, gamete formation |
| Crossing over | ✘ | ✔ |
| Synapsis | ✘ | ✔ |
| Occurs in | Somatic cells | Germ cells |

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✔ Final Note:

All the checkmarks (X) on your worksheet are correct! You've accurately identified the characteristics of mitosis and meiosis.

Great job! 🎉