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Q. No.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 |
71%
From NCERT
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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 |
76%
From NCERT
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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 |
58%
From NCERT
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Mark the correct event during anaphase\(-I\) of meiosis
1. Homologous chromosomes separate
2. Non-homologous chromosomes separate
3. Sister chromatids sperate
4. Non-sister chromatids separate
1. Homologous chromosomes separate
2. Non-homologous chromosomes separate
3. Sister chromatids sperate
4. Non-sister chromatids separate
Subtopic: Cell Cycle: Meiosis I | Cell Cycle: Meiosis II |
72%
From NCERT
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Subtopic: Cell Division: Mitosis (Karyokinesis) |
59%
From NCERT
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_____________ represents the most active state of the cell cycle.
1. Metaphase
2. Anaphase
3. Telophase
4. Interphase
1. Metaphase
2. Anaphase
3. Telophase
4. Interphase
Subtopic: Intro to Cell Cycle & Interphase |
69%
From NCERT
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In an animal cell, cytokinesis is achieved by the formation of
1. Cell plate
2. Furrow
3. Phragmoplast
4. Metaphase plate
1. Cell plate
2. Furrow
3. Phragmoplast
4. Metaphase plate
Subtopic: Cell Division: Mitosis (Cytokinesis) |
86%
From NCERT
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Select the correct match.
| 1 | Metaphase | – | Nuclear membranes reassemble |
| 2 | Anaphase | – | Centromere splitting |
| 3 | Telophase | – | Congression |
| 4 | Prophase | – | Interzonal fibers |
Subtopic: Cell Division: Mitosis (Karyokinesis) |
91%
From NCERT
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Identify the stages with the help of given features (A and B).
A. movement of chromosomes towards the opposite poles.
B. movement of chromatids towards the opposite poles.
| A | B | |
| 1 | Anaphase II | Anaphase I |
| 2 | Anaphase I | Anaphase II |
| 3 | Metaphase I | Anaphase II |
| 4 | Metaphase II | Metaphase I |
Subtopic: Cell Cycle: Meiosis I | Cell Cycle: Meiosis II |
82%
From NCERT
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Metaphase is the best phase to study morphology of chromosomes. How many chromatids you can observe in a somatic cell of human at metaphase?
1. 23
2. 46
3. 92
4. 23 pairs
1. 23
2. 46
3. 92
4. 23 pairs
Subtopic: Cell Division: Mitosis (Karyokinesis) |
55%
From NCERT
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