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UNIT 5 REVIEW SHEET 1. List what happens in each of the following 8 phases: G1,S,G2, M, prophase, metaphase, anaphase, telophase. 2. Which of the above phases are part of interphase? 3. Draw and label ( name only) the phases of mitosis. 4. Define cytokinesis. 5. What are the two parts of cell division? 6. Cells that have lost control over their growth rate and division are _________. 7. Explain two reasons why most cells are small. 8. Why is DNA copied before cell division occurs? 9. If an organism has a diploid number of 24 chromosomes, a. How many chromosomes will be present in a daughter cell produced by mitosis and cell division? b. How many chromosomes will be present in daughter cells produced by meiosis? c. How many chromosomes will be present in a sperm cell of this organism? d. How many chromosomes will be present in a skin cell of this organism? 10. Explain how cell division is different between plant and animal cells. 11. Draw a chromosome as it would look in prophase of mitosis. Label the centromere and sister chromatids. 12. Draw a chromosome as it looks in telophase of mitosis. 13. Draw a diagram of crossing over. 14. What is crossing-over? During which phase of which process (mitosis or meiosis) does it occur? 15. Explain how the cells produced by mitosis are different from the cells produced by meiosis. 16. Label the following 9 processes as being made possible by mitosis or meiosis: growth, asexual reproduction, regeneration, spermatogenesis (making sperm), oogenesis (making eggs), production of haploid cells from diploid cells, separating pairs of chromosomes, production of non-identical cells, production of identical cells. 17. What is the function of spindle fibers? 18. What is a stem cell? 19. Define homologous chromosomes. 20. Define zygote 21. Define sexual reproduction. 22. Variation in a population can be accomplished by which type of reproduction – asexual or sexual. 23. Draw a diagram of oogenesis (egg production). Label the egg and the polar bodies. Also tell whether each cell is diploid (2N) or haploid (N). 24. Draw a diagram of spermatogenesis (sperm production). Label the sperm and tell whether each cell is haploid or diploid. 25. Explain why the chromosome number must be reduced during meiosis. 26. What process follows meiosis that makes a cell diploid again? 27. Define gamete and give two examples. Vocabulary Assignment for Unit 5: Cell Division 1. Cell Cycle 2. Interphase 3. Mitosis 4. Cytokinesis 5. Chromosome 6. Chromatid 7. Centromere 8. Prophase 9. Centriole 10. Spindle fibers 11. Metaphase 12. Anaphase 13. Telophase 14. Asexual Reproduction 15. Somatic Cell 16. Meiosis 17. Homologous 18. Diploid 19. Haploid 20. Tetrad 21. Crossing-over 22. Sexual Reproduction 23. Gamete 24. Zygote 25. Embryo a. b. c. d. e. f. g. h. i. j. k. l. m. n. o. p. q. r. s. t. u. v. w. x. y. Name: The cell is 2N, meaning it has two copies of each chromosome Thread-like fibers that help move the chromosomes around during cell division A new individual in the early stages of development The structures that connect two sister chromatids during cell division The working phase during which the cell grows and ‘does it’s job’ Term used to describe a pair of chromosomes that code for the same traits Phase during which the sister chromatids are pulled apart Structure found only in animal cells that the spindle fibers come from Event during Prophase I, when parts of homologous chromosomes trade pieces Reproduction involving only one parent Structure of two homologous chromosomes together during meiosis; has 4 chromatids Alternates between interphase and cell division Process of a cell dividing it’s cytoplasm and contents First step of cell division in which the nucleus breaks down and the chromosomes thicken Nuclear division that leads to four haploid cells being formed A normal body cell A cell with N number of chromosomes, meaning it has one copy of each chromosome Reproduction involving two parents, introducing more variety Cell division resulting in two 2N cells identical to the parent Structure made of DNA and proteins that carry genes in the cell Phase of cell division during which the new cells begin to form and cytokinesis happens A duplicated copy of a chromosome; two of these start cell division connected A fertilized egg; the first cell of a new organism Step of cell division in which the chromosomes line up in the middle of the cell A sex cell that has one copy of each chromosome; there are male and female