Q. No.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 |
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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 |
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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
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The complex formed by a pair of synapsed homologous chromosomes is called
| 1. | Equatorial plate | 2. | Kinetochore |
| 3. | Bivalent | 4. | Axoneme |
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Match the following with respect to meiosis:
| (a) | Zygotene | (i) | Terminalization |
| (b) | Pachytene | (ii) | Chiasmata |
| (c) | Diplotene | (iii) | Crossing over |
| (d) | Diakinesis | (iv) | Synapsis |
Select the correct option from the following:
| (a) | (b) | (c) | (d) | |
| 1. | (iv) | (iii) | (ii) | (i) |
| 2. | (i) | (ii) | (iv) | (iii) |
| 3. | (ii) | (iv) | (iii) | (i) |
| 4. | (iii) | (iv) | (i) | (ii) |
Amount of cellular DNA increases during:
| 1. | Cytokinesis | 2. | Fertilisation |
| 3. | Mutation | 4. | Respiration |
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Which of the following distinguishes the prophase I of meiosis from the prophase of mitosis?
1. homologous chromosomes pair up
2. spindle forms
3. nuclear membrane breaks down
4. chromosomes become visible
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In G1 phase, a meiocyte has 2N chromosome content and 2C DNA content. The chromosome and DNA content in each cell at the end of first meiotic division would be:
| 1. | 1N; 1C | 2. | 1N; 2C |
| 3. | 2N; 4C | 4. | 2N; 2C |
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
Which of the following does not occur during meiosis?
1. Pairing of homologous chromosomes
2. Exchange of segments between non sister chromatids of homologous chromosomes
3. DNA replication in interkinesis
4. Reduction in chromosome number
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