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Q. No.In meiosis, the splitting of the centromere of each chromosome takes place during:
1.
Metaphase I
2.
Metaphase II
3.
Anaphase I
4.
Anaphase II
Subtopic: Cell Cycle: Meiosis II |
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Consider the given two statements:
| Assertion (A): | Meiosis is the mechanism by which conservation of specific chromosome number of each species is achieved across generations in sexually reproducing organisms. |
| Reason (R): | Meiosis results in reduction of chromosome number by half in gametes. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Cell Cycle: Meiosis I |
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Level 2: 60%+
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Consider the given two statements:
| Statement I: | At Metaphase I the chromosomes align at the equator and the microtubules from opposite poles of the spindle get attached to the kinetochores of sister chromatids. |
| Statement II: | At metaphase II the bivalent chromosomes align on the equatorial plate and microtubules from the opposite poles of the spindle attach to the kinetochore of homologous chromosomes. |
| 1. | Statement I is correct and Statement II is incorrect. |
| 2. | Statement I is incorrect and Statement II is incorrect. |
| 3. | Statement I is correct and Statement II is correct. |
| 4. | Statement I is incorrect and Statement II is correct. |
Subtopic: Cell Cycle: Meiosis I |
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Match the following column I with column II :
| Column I | Column II | ||
| A. | Carcinogen | 1. | Cancerous tumour |
| B. | Anaphase-I | 2. | Disjunction |
| C. | Mitotsis | 3. | Synapsis |
| D. | Zygotene | 4. | Plectonemic coiling |
| A | B | C | D | |
| 1. | 1 | 2 | 4 | 3 |
| 2. | 3 | 1 | 4 | 2 |
| 3. | 2 | 3 | 1 | 4 |
| 4. | 4 | 1 | 3 | 2 |
Subtopic: Cell Cycle: Meiosis I |
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Post mitotic gap phase is characterised by all, except?
| 1. | synthesis of RNA and nucleotides |
| 2. | no change in DNA content |
| 3. | synthesis of histone proteins |
| 4. | growth phase of the cell |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
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Synaptonemal Complex is formed?
1. During Anaphase
2. During Metaphase
3. During Prophase II
4. During Prophase I of meiosis
1. During Anaphase
2. During Metaphase
3. During Prophase II
4. During Prophase I of meiosis
Subtopic: Cell Cycle: Meiosis I |
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Subtopic: Cell Cycle: Meiosis I |
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Synaptonemal complex is formed?
1. During anaphase
2. During metaphase
3. During prophase-II
4. During prophase-I of meiosis
1. During anaphase
2. During metaphase
3. During prophase-II
4. During prophase-I of meiosis
Subtopic: Cell Cycle: Meiosis I |
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Level 1: 80%+
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What will be the DNA content and number of chromosomes in a cell of after S phase as compared to the gamete of the same organism?
| 1. | Same DNA content but double chromosome number |
| 2. | Four times DNA content but double chromosome number |
| 3. | Same DNA content but half chromosome number |
| 4. | Half DNA content but double chromosome number |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
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Level 2: 60%+
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Spindle fibers attach to kinetochores of chromosomes during
| 1. | Metaphase | 2. | Anaphase |
| 3. | Telophase | 4. | Prophase |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
79%
Level 2: 60%+
NEET - 2024
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