Chapter 2 Review - n/a PDF

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Chapter 2 Review Living organisms are categorized into two major groups based on the presence or absence of a nucleus. What group is defined by the presence of a nucleus? Eukaryotic Organism Organized by centrioles, what structures are important in the movement of chromosomes during cell division? Spindle Fibers The diploid chromosome number of an organism is usually represented as 2n. Humans have a diploid chromosome number of 46. What would be the expected haploid chromosome number in a human? 23 A __________ chromosome has its centromere located very close to, but not on, the end of the chromosome Acrocentric During interphase of the cell cycle, ________. DNA content essentially doubles Cells that are metabolically active, but not destined to proliferate, are said to be in __________. G0 Phase Drag each micrograph to the target that indicates the stage of mitosis or cytokinesis it shows.

8. Sort each process into the appropriate bin to indicate the stage of mitosis in which it occurs. If a process occurs in more than one stage, sort it to the stage when it first occurs.

9. Complete the sentences by dragging the terms to the appropriate locations. Terms may be used once, more than once, or not at all.

10. Consider three questions concerning the animal cell that has been treated with the inhibitor. Drag the terms to answer the questions. Terms may be used once, more than once, or not at all.

11. If a typical somatic cell has 64 chromosomes, how many chromosomes are expected in each gamete of that organism? 32 12. The ant Myrmecia pilosula is found in Australia and is named bulldog because of its aggressive behavior. It is particularly interesting because it carries all its genetic information in a single pair of chromosomes. In other words, 2n = 2. (Males are haploid and have just one chromosome.) Which of the following figures would most likely represent a correct configuration of chromosomes in a metaphase I cell of a female?

13. What is the outcome of synapsis, a significant event in meiosis? Side-by-side alignment of homologous chromosomes 14. Which of the following statements about meiosis is true? The chromosome number is reduced by one-half. 15. During meiosis, chromosome number reduction takes place in anaphase II. False 16. Separation of sister chromatids occurs _______. At anaphase in mitosis and anaphase II in meiosis 17. The end result of meiosis is four haploid daughter cells.

True 18. Novel combinations of genes can arise from _______. Reciprocal exchange of DNA between homologs during prophase I 19. In a healthy male, how many sperm cells would be expected to form from (a) 400 primary spermatocytes? (b) 400 secondary spermatocytes? (a) 1600; (b) 800 20. In a healthy female, how many secondary oocytes would be expected to form from 100 primary oocytes? How many first polar bodies would be expected from 100 primary oocytes? 100;100 21. In humans, what is a fundamental difference between the production of female gametes and male gametes? The production of female gametes, but not male gametes, involves an unequal division of cytoplasm. 22. Contrast telophase in plant and animal mitosis. Because of a cell wall around the plasma membrane in plants, a cell plate, which was laid down during anaphase, becomes the middle lamella where primary and secondary layers of the cell wall are deposited. No such structure is seen in animal cells. 23. Drag the appropriate items to their respective bins.

24. Drag the terms on the left to the appropriate blanks on the right to complete the sentences.

25. Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Terms can be used once, more than once, or not at all....