The phase of the cell cycle that lasts for the least time is the:
1. | G1 phase | 2. | S phase |
3. | G2 phase | 4. | M phase |
All the following key events take place during telophase of mitosis except:
1. Chromosomes cluster at the opposite spindle poles
2. Chromosomes become discrete
3. Nuclear envelope reforms
4. Nucleolus, ER and Golgi complex reform
Identify the incorrect statement regarding cytokinesis:
1. | Animal cells divide by cleavage furrow |
2. | Cell plate formation takes place during cytokinesis in plant cells |
3. | The cell wall formation in plant cells starts near the existing lateral walls and grows inwards |
4. | At cytokinesis, mitochondria and plastids are distributed between daughter cells |
At the metaphase plate:
1. | The sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the same pole |
2. | The non sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the same pole |
3. | The sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the opposite poles |
4. | The non sister chromatids of a chromosome are connected by their kinetochores to the spindle fibers from the opposite poles |
Which of the following cells is in transition to metaphase?
1 | 2. | ||
3. | 4. |
During which stage of mitosis do the following events occur?
I. Centromeres split and chromatids separate
II. Chromatids move to opposite poles
1. | Prophase | 2. | Metaphase |
3. | Anaphase | 4. | Telophase |
The cell shown in the given diagram is in:
|
All the following are significances of mitosis except:
1. Restoration of nuclear/cytoplasmic ratio
2. Growth of living organisms
3. Replacement of lost cells
4. Generation of genetic variation
Which of the following stages of Prophase I of meiosis I can last for many months or years in certain vertebrate oocytes?
1. | Zygotene | 2. | Pachytene |
3. | Diplotene | 4. | Diakinesis |
Males produce gametes by mitosis in:
1. | Honey bees | 2. | Grasshopper |
3. | Birds | 4. | Drosophila melanogaster |