UNIT 7 MEIOSIS & CELL CYCLE COMMON ASSESSMENT Use the diagram below to answer Question #1. 1. Examine the drawings of a white blood cell and a nerve cell. Which of the following statements explains why a white blood cell and a nerve cell in a single individual have completely different shapes and functions? B.5.C A. B. C. D. The The The The cells have different sets of chromosomes. two cells have different patterns of gene expression. two cells were formed at different times in the individual’s life. two cells use different genetic codes to translate the same genes. 2. Cells and the organisms they make up reproduce through cell division. Some organisms reproduce through mitosis, while others reproduce through meiosis and fertilization. What advantage does meiosis give to organisms that reproduce sexually? F. G. H. J. B.6.G Meiosis ensures Meiosis ensures Meiosis ensures Meiosis ensures parents. that that that that offspring offspring offspring offspring inherit genes from their parents. will not inherit any genetic disorders. are genetically different from their parents. will have identical phenotypes to their 1 UNIT 7 MEIOSIS & CELL CYCLE COMMON ASSESSMENT Use the following diagram to answer Questions #3 and #4. 3. The chart above shows the lengths of the different stages of the cell cycle. The cell spends most of its time performing which of the following activities? A. B. C. D. Separating the chromatids. Splitting into two daughter cells. Growing and developing the cell. Dissolving the nuclear membrane. B.5.A 4. Once mitosis is completed, the process of cytokinesis occurs. What happens during this process? B.5.A F. G. H. J. The The The The chromatids separate. chromosomes line up. cytoplasm splits in two. nuclear membrane breaks apart. 2 UNIT 7 MEIOSIS & CELL CYCLE COMMON ASSESSMENT 5. The diagram above shows four stages of cells dividing by mitosis. What is the correct sequence of mitotic events in the cell cycle? B.5.A A. B. C. D. 1, 2, 2, 4, 3, 1, 4, 3, 4, 3, 3, 2, 2 4 1 1. Use the diagram below to answer Question #6. A 78 78 B 39 39 39 78 39 6. The numbers in the figure below represent the number found in each of the dog cells shown. The processes that are occurring at A and B are — B.6.G F. G. H. J. mitosis and pollination. meiosis and pollination. mitosis and fertilization. meiosis and fertilization. 3 UNIT 7 MEIOSIS & CELL CYCLE COMMON ASSESSMENT The cells in the figure below were extracted from the same organism. 7. Which answer best explains what characteristic these cells have in common? A. The cells contain the same DNA. B. The cells have the same functions. C. The cells were produced by meiosis. D. The cells underwent the same process of differentiation. B.5.C 8. Why is it important for the cells of multicellular organisms to undergo mitosis? F. G. H. J. Mitosis Mitosis Mitosis Mitosis increases variation within an organism. produces identical cells to the original dividing cell. allows for reproduction with male and female gametes. produces cells that are different from the original dividing cell. B.5.A 4 UNIT 7 MEIOSIS & CELL CYCLE COMMON ASSESSMENT 9. Which statement describes the process shown above? B.6.G A. The cells are produced by mitosis and contain all the genetic information of the father. B. If one of these cells fertilizes an egg, the offspring will be identical to the father. C. Each of these cells contains only half the genetic information necessary for the formation of an offspring. D. An egg fertilized by one of these cells will develop into a female with the same characteristics as the mother. 10. Variation is the raw material for change in organisms, providing a mechanism by which populations may evolve and adapt to changing environmental conditions. Meiosis provides a number of opportunities for increased variation in sexually reproducing populations through each of the following events except — F. G. H. J. fertilization. crossing over. independent assortment of alleles. random distribution of homologous chromosomes. B.6.G 5 UNIT 7 MEIOSIS & CELL CYCLE COMMON ASSESSMENT The diagram below illustrates the process of cell division. Daughter Cells 11. B.5.A What is the significance of anaphase in this process? A. In anaphase, the cell splits in half. B. In anaphase, the DNA is being replicated. C. Anaphase usually ensures that each daughter cell has the same number of chromosomes as the parent cell. D. Anaphase usually ensures that each daughter cell has twice as many chromosomes as the parent cell. 12. The diagram above shows chromosomes in a cell undergoing cell division. If one of the chromosomes breaks during this process, which of the following will most likely happen? B.5.D F. G. H. J. Mutation Selection Duplication Segregation 6 UNIT 7 MEIOSIS & CELL CYCLE COMMON ASSESSMENT 13. The phase of cell division in which chromatin condenses into chromosomes is — A. B. C. D. telephase. anaphase. prophase. apoptosis. B.5.A 14. Compared to sexual reproduction, asexual reproduction results in a — E. F. G. H. longer life span of a cell. greater variation in offspring. larger number of identical cells. fewer numbers of cells dividing. B.6.G The diagram below represents single-celled organism “A” dividing by mitosis to form cells “B” and “C”. 15. Each of the cells A, B, and C produce protein X. Which of the following statements can best be inferred from this observation? B.5.A A. B. C. D. Protein X is found in all organisms. The gene for protein X is found in single-celled organisms, only. Cells A, B, and C ingested food containing the gene to produce protein X. The gene to produce protein X was passed from cell A to cells B and C. 7 UNIT 7 MEIOSIS & CELL CYCLE COMMON ASSESSMENT 16. Cancer is one of the leading causes of death in the United States. Which of the following best describes cancer? F. G. H. J. Infection of foreign bodies called tumors. Uncontrolled growth and division of cells. Infectious cellular disease that you inherit. Individual’s immune system attacking itself. B.5.D The diagram below represents a series of events in the development of a bird. 17. Which series of terms best represents the sequence of processes shown? A. B. C. D. meiosis → growth → differentiation mitosis → meiosis → differentiation meiosis → differentiation → growth mitosis → differentiation → growth B.5.A DNA replicates in order for all cells to have identical DNA. The process of DNA replication is diagramed below. 18. B.5.C When does DNA replication occur? F. G. H. J. During recombination. Just before mitosis. After fertilization. In a mutation. 8 UNIT 7 MEIOSIS & CELL CYCLE COMMON ASSESSMENT 19. B.5.A An open wound on a frog’s foot will repair itself using the process of — A. B. C. D. mitosis. meiosis. Pinocytosis phagocytosis. 20. Some unicellular protists, such as dinoflagellates, use mitosis to reproduce. Which of the following statements describes the offspring? B.5.A F. G. H. J. The The The The offspring offspring offspring offspring are twice as large as the parent. develop from a parent’s fertilized egg. are genetically identical to the parent. have half as many chromosomes as the parent 9