12 : CELL DIVISIONObjective questions 1. Which of the following is true of meiosis ? A. The daughter cells get half the number of chromosome from the parent cell. B. The daughter cells get the same number of chromosome as the parent cell. C. Homologous chromosomes do not pair up in meiosis. D. It contributes to asexual reproduction. 2. A pair of chromosome is homologous when A. They are same of the same length. B. Their centromeres are in the same position. C. The same genes are located at the same loci. D. All of the above. 3. Movement of chromosome during anaphase is due to A. Centrioles move towards the opposite poles. B. Spindle fibers contract and pull the chromatids to opposite poles. C. Crossing over occurs. D. Cytokinesis. 4. List four phases of mitosis in correct order. A. Anaphase, Telophase, Metaphase and Prophase. B. Metaphase, Telophase, Prophase and Anaphase. C. Prophase, Metaphase, Anaphase and Telophase. D. Prophase, Anaphase, Telophase and Metaphase. Biology Unit, Kolej Matrikulasi Melaka 1 5. In the cell cycle. the phase of chromosomes replication D. “ Each chromatid starts moving to different poles. Interphase I C. metaphase D. 30 D. Metaphase II Biology Unit. prophase C. the chromosomes separate 8. All of the following occur during prophase I in animal cells except A. Anaphase II B. If a cell containing 20 chromatids at metaphase of mitosis . the homologous chromosomes pair up C. how many chromosome present in each nucleus when cell division has completed ? A. 20 B. Cell is haploid “ During which phase does this event take place in the cell ? A. The longest phase in mitosis is A. the chromosomes condense B. the phase of cell growth C. anaphase B. the phase cell prepares for mitosis 6. the longest phase in intephase B. tetrads are formed D. Kolej Matrikulasi Melaka 2 . 40 7. Telophase I D. telophase 9. 10 C. S is A. metaphase D. interphase B. anaphase Structure Questions 1. Figure 1 show two stages in a cell division. DNA duplication takes place during A.10. Cell 1 Figure 1 a) Identify the stages for cell 1 and cell 2. Kolej Matrikulasi Melaka 3 . prophase C. Cell 2 Cell 1 : _______________________________________________________________ Cell 2 : _______________________________________________________________ (2 marks) Biology Unit. ______________________________________________________________________ ______________________________________________________________________ (2 marks) 2. ______________________________________________________________________ ______________________________________________________________________ (2 marks) d) How many chromosomes in each daughter cell at the end of the cell division for cell 1 and cell 2? Cell 1 : _______________________________________________________________ Cell 2 : _______________________________________________________________ (2 marks) e) State TWO importance of mitosis in multicellular organisms. Kolej Matrikulasi Melaka 4 . A : ___________________________________________________________________ B : ___________________________________________________________________ (2 marks) c) State the chromosomal behaviour for cell 1 and cell 2. The figure 2 shows a cell that undergoes cell division in anaphase I. Figure 2 Biology Unit.b) Name the structures labelled A and B. Give a two reasons to your answer. __________________________________________________________________ (1 mark) c) Give two importance of the process to an organism stated in (b). __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ (3 marks) b) Name the process that lead to exchanging chromatid segments between the non sister chromatids X and Y. (4 marks) Biology Unit. __________________________________________________________________ __________________________________________________________________ (2 marks) d) Draw the behavior of chromosome that occur in anaphase II of meiosis in each cell below.a) State if the division above occur in animal or plant cell. Kolej Matrikulasi Melaka 5 . Kolej Matrikulasi Melaka 6 .Essay Questions 1. (10 marks) Biology Unit. (5 marks) (b) Describe the behavior of the chromosomes at each stage in mitosis. State the significance of mitosis and meiosis. (5 marks) 2. (a) Explain the differences between cytokinesis in animals and plants.