The figure shows a dividing cell at:
|
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 |
When a cell is preparing for mitosis, it is said to be in which phase of the cell cycle?
| 1. | G1 | 2. | G0 |
| 3. | S | 4. | G2 |
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 |
Consider the following events:
| I. | Centromere split and chromatids separate |
| II. | Chromatids move to opposite poles |
The stage of mitosis characterized by these two events is:
| 1. | Prophase | 2. | Metaphase |
| 3. | Anaphase | 4. | Telophase |
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 |
Consider the following two statements:
| I: | The growth of multi-cellular organisms is due to mitosis. |
| II: | Mitosis results in the production of diploid daughter cells with identical genetic complement usually. |
Of the two statements:
| 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 |
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 |
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 |
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