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Q. No.Study the given two statements – an Assertion and Reason, and select the correct answer from the options given:
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 increases the genetic variability in the populations of organisms from one generation to the next.
1.
Both (A) and (R) are true and (R) correctly explains (A)
2.
(A) is true but (R) is false
3.
(A) is false but (R) is true.
4.
Both (A) and (R) are true but (R) does not correctly explain (A).
Subtopic: Cell Cycle: Meiosis I | Cell Cycle: Meiosis II |
52%
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Hints
In Prophase I of Meiosis I, recombination between homologous chromosomes is completed:
1. by the end of zygotene
2. by the end of pachytene
3. at the beginning of diplotene
4. when terminalisation of chiasmata occurs at diakinesis
1. by the end of zygotene
2. by the end of pachytene
3. at the beginning of diplotene
4. when terminalisation of chiasmata occurs at diakinesis
Subtopic: Cell Cycle: Meiosis I |
74%
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During meiosis I, the chromosomes start pairing at:
| 1. | Zygotene | 2. | Pachytene |
| 3. | Diplotene | 4. | Leptotene |
Subtopic: Cell Cycle: Meiosis I |
76%
From NCERT
NEET - 2013
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During the metaphase stage of mitosis spindle fibres attach to chromosomes at:
| 1. | kinetochore |
| 2. | both centromere and kinetochore |
| 3. | centromere, kinetochore and areas adjoining centromere |
| 4. | centromere |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
89%
From NCERT
NEET - 2013
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
A stage of mitosis is shown in the diagram. Which stage is it and what are its characteristics?
| 1. | Metaphase-spindle fibers attached to kinetochores, centromeres split and chromatids separate |
| 2. | Metaphase- chromosomes moved to spindle equator, chromosomes made up of two sister chromatids |
| 3. | Anaphase - centromeres split and chromatids separate and start moving away |
| 4. | Late prophase - chromosomes move to spindle equator |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
78%
From NCERT
NEET - 2013
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NEET 2026 - Target Batch - Vital
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What will be correct regarding metaphase of mitosis?
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
| I: | The complete disintegration of the nuclear envelope marks the start of metaphase. |
| II: | Condensation of chromosomes is completed. |
| III: | All the chromosomes come to lie at the equator. |
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Cell Division: Mitosis (Karyokinesis) |
84%
From NCERT
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Identify the incorrectly matched pair:
| 1. | Prophase II: | The nuclear membrane disappears by the end of this stage and the chromosomes again become compact. |
| 2. | Metaphase II: | The chromosomes align at the equator and the microtubules from opposite poles of the spindle get attached to the kinetochores of sister chromatids. |
| 3. | Anaphase II: | The homologous chromosomes separate, while sister chromatids remain associated at their centromeres. |
| 4. | Telophase II: | The two groups of chromosomes once again get enclosed by a nuclear envelope |
Subtopic: Cell Cycle: Meiosis II |
82%
From NCERT
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In a somatic eukaryotic cell undergoing mitosis, when do expect to find most number of chromosomes in the cell?
| 1. | At the end of the G1 phase |
| 2. | At the end of the S phase |
| 3. | At the end of Anaphase |
| 4. | In the resultant daughter cells |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
61%
From NCERT
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In a eukaryote, the cell cycle typically is divided into:
| 1. | Two phases | 2. | Three phases |
| 3. | Four phases | 4. | Five phases |
Subtopic: Intro to Cell Cycle & Interphase | Cell Division: Mitosis (Karyokinesis) | Cell Division: Mitosis (Cytokinesis) |
72%
From NCERT
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| Assertion(A): | Mitosis is called equational division. |
| Reason(R): | The amount of DNA is the same in parent and progeny cells if it is mitosis. |
| 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 Division: Mitosis (Karyokinesis) |
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
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