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Q. No.The oocytes of some vertebrates get arrested for years or months in:
1. Telophase - I
2. Diplotene
3. Diakinesis
4. Metaphase - I
Subtopic: Cell Cycle: Meiosis I |
90%
From NCERT
NEET - 2022
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Select the correct sequence of events occurring during Prophase-I of Meiosis-I:
| (a) | Nuclear envelope breakdown |
| (b) | Synaptonemal complex formation |
| (c) | Compaction of chromosomes |
| (d) | Terminalisation of chiasmata |
| (e) | Crossing over |
Choose the most appropriate answer from the options given below:
1. (c) → (b) → (e) → (d) → (a)
2. (c) → (a) → (b) → (d) → (e)
3. (b) → (c) → (a) → (d) → (e)
4. (c) → (a) → (b) → (e) → (d)
Subtopic: Cell Cycle: Meiosis I |
61%
From NCERT
NEET - 2022
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If there are 20 centromeres in a cell at anaphase, how many chromosomes are there in each daughter cell following cytokinesis?
1. 10
2. 20
3. 30
4. 40
1. 10
2. 20
3. 30
4. 40
Subtopic: Intro to Cell Cycle & Interphase | Cell Division: Mitosis (Karyokinesis) |
52%
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Hints
| A: | Mitosis does play a role in gamete formation. |
| R: | Haploid organisms divide by mitosis. |
| 1. | Both Assertion & Reason are true and the Reason is the correct explanation of the Assertion. |
| 2. | Both Assertion & Reason are true but the Reason is not the correct explanation of the Assertion |
| 3. | Assertion is a true statement but Reason is false. |
| 4. | Both Assertion and Reason are false statements. |
Subtopic: Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
From NCERT
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Given its composition and location, the phragmoplast should be directly involved in the
1. segregation of daughter chromosomes during anaphase
2. poleward migration of centrosomes during prophase
3. synthesis of sporopollenin during G1 and G2 phases
4. construction of the cell plate during cytokinesis
1. segregation of daughter chromosomes during anaphase
2. poleward migration of centrosomes during prophase
3. synthesis of sporopollenin during G1 and G2 phases
4. construction of the cell plate during cytokinesis
Subtopic: Intro to Cell Cycle & Interphase |
68%
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Hints
Select the correct option based on statements below:
| Assertion (A): | Meiosis leads to recombinations of genes. |
| Reason (R): | Crossing over occurs in pachytene sub-stage of prophase I of meiosis. |
| 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. | Both (A) and (R) are false. |
Subtopic: Cell Cycle: Meiosis I |
75%
From NCERT
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| A: | Tendency of parental combinations to remain together is called crossing over. |
| R: | Crossing over provides proof in favour of the linear arrangement of genes on chromosomes. |
| 1. | If both Assertion & Reason are true and the reason is the correct explanation of the assertion.. |
| 2. | If both Assertion & Reason are true but the reason is not the correct explanation of the assertion. |
| 3. | If Assertion is a true statement but Reason is false.. |
| 4. | If both Assertion and Reason are false statements. |
Subtopic: Cell Cycle: Meiosis I |
53%
From NCERT
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During which phase of mitosis do the chromatids become chromosomes?
1. telophase
2. anaphase
3. prophase
4. metaphase
1. telophase
2. anaphase
3. prophase
4. metaphase
Subtopic: Cell Division: Mitosis (Karyokinesis) |
From NCERT
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During growth the contents of a nucleus in human body undergo profound changes. How many chromatids does it contain?
1. 96
2. 23
3. 46
4. 92
1. 96
2. 23
3. 46
4. 92
Subtopic: Intro to Cell Cycle & Interphase |
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In the adult animal, most of the cells appear to exhibit division except
1. Liver cells
2. Spleen cells
3. Blood cells
4. Heart cells
1. Liver cells
2. Spleen cells
3. Blood cells
4. Heart cells
Subtopic: Intro to Cell Cycle & Interphase |
84%
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