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Q. No.During pachytene of prophase I of meiosis I:
I:
the four chromatids of each bivalent chromosome become distinct and clearly appear as tetrads.
II:
there is the appearance of recombination nodules.
III:
crossing over occurs.
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Cell Cycle: Meiosis I |
81%
From NCERT
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The beginning of diplotene of prophase I of meisosis I is recognised by:
I: the dissolution of the synaptonemal complex.
II: and the tendency of the recombined homologous chromosomes of the bivalents to separate
from each other at the sites of crossovers.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
I: the dissolution of the synaptonemal complex.
II: and the tendency of the recombined homologous chromosomes of the bivalents to separate
from each other at the sites of crossovers.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Cell Cycle: Meiosis I |
From NCERT
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Which stage of prophase I of meiosis I can last for months or years in oocytes of some vertebrates?
1. Zygotene
2. Pachytene
3. Diplotene
4. Diakinesis
1. Zygotene
2. Pachytene
3. Diplotene
4. Diakinesis
Subtopic: Cell Cycle: Meiosis I |
91%
From NCERT
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During Metaphase I:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | The bivalent chromosomes align on the equatorial plate. |
| II: | The microtubules from the opposite poles of the spindle attach to the kinetochore of homologous chromosomes. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Cell Cycle: Meiosis I |
92%
From NCERT
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The stage of meiosis I, characterised by the following events, is:
I: The nuclear membrane and nucleolus reappear.
II: Some dispersion of chromosomes.
1. Prophase I
2. Metaphase I
3. Anaphase I
4. Telophase I
I: The nuclear membrane and nucleolus reappear.
II: Some dispersion of chromosomes.
1. Prophase I
2. Metaphase I
3. Anaphase I
4. Telophase I
Subtopic: Cell Cycle: Meiosis I |
94%
From NCERT
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In contrast to meiosis I, meiosis II:
| 1. | is much lengthy in duration. |
| 2. | leads to reduction in the number of chromosomes. |
| 3. | is characterised by replication of DNA just before its beginning. |
| 4. | resembles a normal mitosis. |
Subtopic: Cell Cycle: Meiosis II |
83%
From NCERT
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In meiotic cell division, the simultaneous splitting of the centromere of each chromosome allowing sister chromatids to move toward opposite poles of the cell by shortening of microtubules attached to kinetochores, occurs during:
1. Metaphase I
2. Metaphase II
3. Anaphase I
4. Anaphase II
1. Metaphase I
2. Metaphase II
3. Anaphase I
4. Anaphase II
Subtopic: Cell Cycle: Meiosis II |
81%
From NCERT
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The cell shown in the given figure is most likely at:
1. Metaphase I
2. Metaphase II
3. Anaphase I
4. Anaphase II
1. Metaphase I
2. Metaphase II
3. Anaphase I
4. Anaphase II
Subtopic: Cell Cycle: Meiosis I | Cell Cycle: Meiosis II |
65%
From NCERT
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Independent assortment occurs in eukaryotic organisms during meiotic:
1. Metaphase I
2. Metaphase II
3. Anaphase I
4. Anaphase II
1. Metaphase I
2. Metaphase II
3. Anaphase I
4. Anaphase II
Subtopic: Cell Cycle: Meiosis I | Cell Cycle: Meiosis II |
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Match the phases of Prophase I in Column I with corresponding events in Column II and select the correct match from the codes given:
Codes:
| Column I | Column II | ||
| A | Zygotene | P | Recombination |
| B | Pachytene | Q | Terminalisation of chismata |
| C | Diplotene | R | Synapsis |
| D | Diakinesis | S | Dissolution of synaptonemal complex |
| A | B | C | D | |
| 1. | R | P | S | Q |
| 2. | R | P | Q | S |
| 3. | P | R | S | Q |
| 4. | P | R | Q | S |
Subtopic: Cell Cycle: Meiosis I |
85%
From NCERT
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