Q. No.Arrange the following events of meiosis in correct sequence
(a) Crossing over
(b) Synapsis
(c) Terminalisation of chiasmata
(d) Disappearance of nucleolus
1.
(b), (c), (d), (a)
2.
(b), (a), (d), (c)
3.
(b), (a), (c), (d)
4.
(a), (b), (c), (d)
(a) Crossing over
(b) Synapsis
(c) Terminalisation of chiasmata
(d) Disappearance of nucleolus
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A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has
| 1. | Twice the number of chromosomes and twice the amount of DNA |
| 2. | Same number of chromosomes but twice the amount of DNA |
| 3. | Twice the number of chromosomes and four times the amount of DNA |
| 4. | Four times the number of chromosomes and twice the amount of DNA |
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Which of the following is not a characteristic feature during mitosis in somatic cells?
1. Spindle fibres
2. Disappearance of nucleolus
3. Chromosome movement
4. Synapsis
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Identify the stage of mitosis shown in the given diagram:
| 1. | Prophase | 2. | Metaphase |
| 3. | Anaphase | 4. | Telophase |
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Identify the correct statements regarding G1 phase of the cell cycle:
| I: | It is the post-mitotic gap phase |
| II: | The cell is metabolically active and grows continuously |
| III: | Cell replicates its DNA |
| 1. | Only II | 2. | I and II only |
| 3. | Only I | 4. | I, II and III |
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What would be the DNA content and chromosome number in a cell at the end of S phase with 2C DNA content and 2N chromosome number in G1?
| 1. | 4C and 4N | 2. | 2C and 4N |
| 3. | 4C and 2N | 4. | 2C and 2N |
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Proteins are synthesized in preparation for mitosis during:
| 1. | G1 phase | 2. | S phase |
| 3. | G2 phase | 4. | M phase |
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The cells in the quiescent stage [G0] phase of the cell cycle:
| 1. | exit from the S phase |
| 2. | continue the events of cell cycle and complete the division |
| 3. | are metabolically active |
| 4. | cannot ever proliferate |
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Mitosis is also called ‘equational division’ because:
| 1. | the number of chromosomes in both daughter cells are the same |
| 2. | the sum of the number of chromosomes in two daughter cells is equal to the number of chromosomes in the parent cell |
| 3. | each progeny cell receives only one set of chromosomes from the parent cell |
| 4. | the number of chromosomes in the parent and the progeny cells is the same |
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