Q. No.Humans have a haploid chromosome number n = 23. How many tetrads will be formed during meiosis?
| 1. | 23 | 2. | 46 |
| 3. | 69 | 4. | 92 |
Subtopic: Cell Cycle: Meiosis I | Cell Cycle: Meiosis II |
61%
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Amount of cellular DNA increases during:
| 1. | Cytokinesis | 2. | Fertilisation |
| 3. | Mutation | 4. | Respiration |
Subtopic: Cell Cycle: Meiosis I |
55%
From NCERT
AIPMT - 1999
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Consider the given two statements:
| I: | The kinetochore is essential for the chromosome segregation that is classically associated with mitosis and meiosis. |
| II: | The kinetochore assembles on the centromere and links the chromosome to microtubule polymers from the mitotic spindle during mitosis and meiosis. |
| 1. | Both I and II are correct and II explains I |
| 2. | Both I and are correct but II does not explain I |
| 3. | I is correct and II is incorrect |
| 4. | Both I and II are incorrect |
Subtopic: Cell Division: Mitosis (Karyokinesis) | Cell Cycle: Meiosis I |
73%
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Crossing over that results in genetic recombination in higher organisms occurs between:-
1. Non-sister chromatids of a bivalent
2. Two daughter nuclei
3. Two different bivalents
4. Sister chromatids of a bivalent
Subtopic: Cell Cycle: Meiosis I |
96%
From NCERT
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In meiosis, DNA replication occurs:
| 1. | Only once before Meiosis I |
| 2. | Only once before Meiosis II |
| 3. | Twice, once before meiosis I and once during interkinesis |
| 4. | Twice, once before meiosis I and once during anaphase I of meiosis I |
Subtopic: Cell Cycle: Meiosis I |
81%
From NCERT
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Cells at the end of prophase of mitosis, when viewed under the microscope, do not show:
| I: | Golgi complexes |
| II: | Endoplasmic reticulum |
| III: | Nucleolus |
| IV: | Nuclear envelope |
1. Only I and II are correct
2. Only III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
Subtopic: Cell Cycle: Meiosis I |
89%
From NCERT
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Match the stage of Prophase I of Meiosis I given in Column I with the corresponding event in Column II and select the correct match from the codes given below:
Codes:
| Column I | Column II | ||
| A. | Zygotene | P. | Crossing over |
| B. | Pachytene | Q. | Synapsis |
| C. | Diplotene | R. | Terminalization of chiasmata |
| D. | Diakinesis | S. | Appearance of chiasmata |
| A | B | C | D | |
| 1. | Q | P | S | R |
| 2. | P | Q | S | R |
| 3. | P | Q | R | S |
| 4. | Q | P | R | S |
Subtopic: Cell Cycle: Meiosis I |
84%
From NCERT
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The phase of mitosis in which the spindle fibers break apart, two new nuclear membranes begin to form, and the chromosomes disperse into chromatin is
| 1. | metaphase | 2. | telophase |
| 3. | anaphase | 4. | prophase |
Subtopic: Cell Cycle: Meiosis I | Cell Cycle: Meiosis II |
83%
From NCERT
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Consider the given two statements:
| I: | Meiosis is responsible for maintaining the chromosome number across generations in sexually reproducing organisms. |
| II: | Meiosis results in reduction of chromosome number by half in the daughter cells. |
| 1. | Both I and II are correct and II explains I |
| 2. | Both I and II are correct but II does not explain I |
| 3. | I is correct but II is incorrect |
| 4. | I is incorrect but II is correct |
Subtopic: Cell Cycle: Meiosis I | Cell Cycle: Meiosis II |
74%
From NCERT
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Identify the correct statement regarding meiosis amongst the following:
| I: | Meiosis involves two sequential cycles of nuclear and cell divisions but only a single cycle of DNA replication. |
| II: | Meiosis II is initiated after the parental chromosomes have replicated to produce identical sister chromatids at the S phase. |
| III: | Meiosis involves pairing of bivalents and recombinations between them. |
| 1. | I only | 2. | I and II only |
| 3. | I and III only | 4. | I, II and III |
Subtopic: Cell Cycle: Meiosis I |
59%
From NCERT
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