The given diagram shows a stage during mitotic division in an animal cell:
(i) Identify the stage. Give a reason to support your answer.
(ii) Draw a neat labelled diagram of the cell as it would appear in the next stage. name the stage.
(iii)In what two ways is mitotic division in an animal cell different from the mitotic division in a plant cell?
(iv)Name the type of cell division that occurs during:
A. Growth of shoot B.Formation of pollen grains.
The given diagram shows a stage during mitotic division in an animal cell:
(i) Identify the stage. Give a reason to support your answer.
(ii) Draw a neat labelled diagram of the cell as it would appear in the next stage. name the stage.
(iii)In what two ways is mitotic division in an animal cell different from the mitotic division in a plant cell?
(iv)Name the type of cell division that occurs during:
A. Growth of shoot B.Formation of pollen grains.
(i)
- Anaphase of mitosis is depicted in the diagram because the chromatids are migrating towards opposite poles which is a distinct characteristic of Anaphase.
- Mitosis is that step in the cell cycle where the newly formed DNA is separated and two new cells are formed with the same number and kind of chromosomes as the parent nucleus.
- One of the two strands of a copied chromosome is called a chromatid.
- Chromosomes are thick rod-like structures that contain genes and are found in the nucleus.
(ii)
- The next stage after anaphase is telophase.
- The process of mitosis, which splits the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells, is called telophase.
(iii) Difference between mitosis in plant and animal cell
Animal cell
Plant cell
1. The amphiastral spindle is created. 1. The produced spindle is astral. 2. Cytokinesis is via the constriction (furrow) method. 2. Cytokinesis is via the cell plate method. 3. Cytokinesis moves from the exterior to the centre. 3. Cytokinesis moves from the centre to the periphery. 4. Because there is a centrosome present, two asters develop. 4. Because the centrosome is missing, no asters develop.
(iv)
A. The cell division that occurs during the growth of a shoot is Mitosis.
Mitosis is a type of cell division in which a parent cell divides into two daughter cells, each with the same number of chromosomes as the parent cell.
B. The cell division that occurs during the formation of pollen grains is Meiosis.
Meiosis is a type of cell division in which a cell divides into two daughter cells, each with half the number of chromosomes as the parent cell.
(i)
- Anaphase of mitosis is depicted in the diagram because the chromatids are migrating towards opposite poles which is a distinct characteristic of Anaphase.
- Mitosis is that step in the cell cycle where the newly formed DNA is separated and two new cells are formed with the same number and kind of chromosomes as the parent nucleus.
- One of the two strands of a copied chromosome is called a chromatid.
- Chromosomes are thick rod-like structures that contain genes and are found in the nucleus.
(ii)
- The next stage after anaphase is telophase.
- The process of mitosis, which splits the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells, is called telophase.
(iii) Difference between mitosis in plant and animal cell
Animal cell | Plant cell |
| 1. The amphiastral spindle is created. | 1. The produced spindle is astral. |
| 2. Cytokinesis is via the constriction (furrow) method. | 2. Cytokinesis is via the cell plate method. |
| 3. Cytokinesis moves from the exterior to the centre. | 3. Cytokinesis moves from the centre to the periphery. |
| 4. Because there is a centrosome present, two asters develop. | 4. Because the centrosome is missing, no asters develop. |
(iv)
A. The cell division that occurs during the growth of a shoot is Mitosis.
Mitosis is a type of cell division in which a parent cell divides into two daughter cells, each with the same number of chromosomes as the parent cell.
B. The cell division that occurs during the formation of pollen grains is Meiosis.
Meiosis is a type of cell division in which a cell divides into two daughter cells, each with half the number of chromosomes as the parent cell.
