2. If you are a male, how many chromosomes did you get from your mother? A. 1 B. 22 C. 23 D. 46

Transcription

1 3rd lecture test BIOL :30 Fall In mitosis an organism starts with a diploid cell that has 12 chromosomes. At the end of mitosis, how many cells are produced, and how many chromosomes will they have? A. 4 cells, 6 chromosomes B. 4 cells, 12 chromosomes C. 2 cells, 12 chromosomes D. 2 cells, 6 chromosomes 2. If you are a male, how many chromosomes did you get from your mother? 2 C. 23 D Of the following phases, which stage comprises the majority of the cell cycle? A. interphase B. anaphase C. metaphase D. prophase 4. Where in humans does mitosis take place? A. skin cells B. bone cells C. liver cells D. all of the above 5. In which stage of mitosis does the mitotic spindle break down? A. anaphase B. prophase C. telophase D. metaphase 6. In metaphase of mitosis, each chromosome consists of chromatid/chromatids. C. 4 D. chromosomes don't form until metaphase 7. In mitosis, the is dividing. A. cytoplasm B. nucleus C. chromosome D. centromere 8. What is the function of the spindle apparatus? A. forms the boundaries between new cells B. duplicates the chromosomes C. moves the chromosomes within the cell D. separates the cell membranes 9. In which stage does the mitotic spindle form? A. interphase B. prophase C. metaphase D. telophase 10. Which of the following is mitosis used for in humans? A. to produce diploid cells B. to produce haploid cells C. produce gametes D. all of the above

2 11. Which of the following is not a potential effect of global warming? A. decreasing sea levels B. spread of tropical diseases C. changes in rainfall patterns D. increase in violence of hurricanes 12. Which of the following is the difference between a malignant tumor and a benign tumor? A. benign tumors are not made of cells B. malignant tumors are not made of cells C. malignant tumors are anchorage dependent D. benign tumors can not metastasize 13. What process consumes the greenhouse gas carbon dioxide? A. respiration B. photosynthesis C. condensation D. all of the above 14. Why does radiation treatment make some people sick? A. can destroy healthy cells that are dividing B. causes cancer cells to release toxins C. stimulates immune system to release antihistamines D. causes cancer cells to replicate and invade healthy tissues 15. How are cancer cells different from normal cells? A. Cancer cells are not anchorage dependent B. Cancer cells are not density dependent C. Cancer cells divide excessively D. all of the above Use the diagram below to answer the next three questions: 16. What stage in meiosis is the above diagram? A. anaphase I B. prophase I C. metaphase I D. metaphase II 17. In each pair of chromosomes seen above, there is: A. one chromosome from the mother, one from the father B. a chromosome composed of a single sister chromatid C. a cleavage furrow D. exactly the same DNA

3 18. In the next stage of meiosis: A. crossing over takes place B. homologous chromosomes align in the middle of the cell C. the spindle apparatus breaks down D. sister chromatids separate 19. (T or F) In humans, meiosis only takes place in the reproductive organs. Use the information below to answer the next 4 questions: A male organism starts meiosis with a diploid # of 8 chromosomes in a single cell: 20. At the end of meiosis I, how many cells will there be, and how many chromosomes in each cell? A. 1 cell, 8 chromosomes B. 4 cells, 4 chromosomes C. 1 cell, 4 chromosomes D. 2 cells, 4 chromosomes 21. At the end of meiosis II, how many cells will there be, and how many chromosomes in each cell? A. 2 cells, 8 chromosomes B. 4 cells cell, 2 chromosomes C. 2 cells, 4 chromosomes D. 4 cells, 4 chromosomes 22. What type of cells will be produced in the above division? A. autosomal cells B. somatic cells C. sperm cells D. diploid cells 23. At the end of meiosis I, how many sister chromatids will each chromosome have? C. 4 D In what stage of meiosis do sister chromatids separate? A. anaphase I B. anaphase II C. metaphase I D. prophase I 25. When do chromosomes duplicate in meiosis? A. between meiosis I and meiosis II B. before meiosis I and meiosis II C. during prophase I D. only prior to meiosis I 26. In what stage of meiosis does independent assortment occur? A. anaphase II B. metaphase II C. metaphase I D. prophase II

4 27. Crossing over takes place between in. A. homologous chromosomes, mitosis B. sister chromatids, prophase II C. homologous chromosomes, prophase I D. sister chromatids, metaphase II 28. If you are a female human, how many X chromosomes did you get from your dad? C. 4 D If an organism has a gamete with 3 chromosomes, how many different possible combinations of chromosomes can be found in that gamete? A. 2 B. 1 C. 4 D Which of the following is a difference between mitosis and meiosis? A. no crossing over in mitosis B. the nucleus does not divide in meiosis C. there are no chromatids in meiosis D. all of the above Use the information below to answer the next two questions: Y = yellow seeds, y = green seeds Two heterozygous yellow seeded plants cross. 31. What proportion of the offspring would you expect to have yellow seeds? A. ¼ B. ½ C. ¾ D. all of them 32. What proportion would you expect to have green seeds? A. ¼ B. ½ C. ¾ D. none of them 33. Hypercholesterolemia is an incompletely dominant trait. If two parents are heterozygous for the condition, what are the chances their child will be normal? A. ½ B. no chance C. ¾ D. ¼ 34. (T or F) A type O parent can never have a type AB child. 35. A mother with type A blood has a type B child. What is the child's genotype? A. I B I B B. I B i C. cannot be determined from the above information D. A type A mother cannot have a type B child

5 Use the information below to answer the next 3 questions: Y = yellow seeds, y = green seeds, P = purple flowers, p = white flowers If you cross a plant that is heterozygous for both traits, with a plant that is heterozygous for seed color and has white flowers, then: 36. What proportion of the offspring would you expect to have green seeds and purple C. 1/8 D. 3/4 37. What proportion of the offspring would you expect to have yellow seeds and white C. 3/8 D. 9/ What proportion of the offspring would you expect to have green seeds and white C. 1/8 D. 9/ In phenylketoneuria, an allele at a single locus affects many traits. This would be an example of: A. a polygenic trait B. continuous variation C. pleiotropy D. all of the above 40. (T or T) So the day the gorilla was teaching the class a visiting high school student and her mom from Wisconsin stopped in to see a sample class at Auburn University, guess Auburn won't be seeing that out of state tuition!