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Basic Biology Practice Test: Meiosis and Sexual Life Cycles
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Meiosis and fertilization alternate in sexual life cycles.  Meiosis is a process that produces reproductive cells called gametes. These gametes have half the number of chromosomes as the parent cell.  During fertilization, two haploid cells (gametes) fuse to form a diploid zygote. This restores the diploid condition.  Sexual life cycles produce genetic variation among offspring. This is because during meiosis, homologous chromosomes pair up and exchange genetic material. This process is called crossing over. The resulting cells are genetically unique because of the random assortment of... Show more
Basic Biology Practice Test: Meiosis and Sexual Life Cycles
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25 Questions

1. Which of the following might result in a human zygote with 45 chromosomes?
2. Which of the following is true of a species that has a chromosome number of 2n = 16?
3. Which life cycle stage is found in plants but not animals?
4. Homologous chromosomes move toward opposite poles of a dividing cell during
5. When we see chiasmata under a microscope, that lets us know which of the following has occurred?
6. Which of these statements is false?
7. The somatic cells of a privet shrub each contain 46 chromosomes. To be as different as they are from human cells, which have the same number of chromosomes, which of the following must be true?
8. Eukaryotic sexual life cycles show tremendous variation. Of the following elements, which do all sexual life cycles have in common?
I.Alternation of generations
II.Meiosis
III.Fertilization
IV.Gametes
V.Spores
9. If the DNA content of a diploid cell in the G1 phase of the cell cycle is x, then the DNA content of a single cell at metaphase of meiosis II would be
10. The human X and Y chromosomes
11. A triploid cell contains three sets of chromosomes. If a cell of a usually diploid species with 42 chromosomes per cell is triploid, this cell would be expected to have which of the following?
12. After telophase I of meiosis, the chromosomal makeup of each daughter cell is
13. Which of the following defines a genome?
14. In the human species, all somatic cells have 46 chromosomes. Which of the following can also be true?
15. A cell divides to produce two daughter cells that are genetically different.
16. Which of the following can utilize both mitosis and meiosis in the correct circumstances?
17. Experiments with cohesins have found that
18. The karyotype of one species of primate has 48 chromosomes. In a particular female, cell division goes awry and she produces one of her eggs with an extra chromosome (25). The most probable source of this error would be a mistake in which of the following?
19. If the DNA content of a diploid cell in the G1 phase of the cell cycle is x, then the DNA content of the same cell at metaphase of meiosis I would be
20. The human genome is minimally contained in which of the following?
21. To view and analyze human chromosomes in a dividing cell, which of the following is/are required?
22. In a human karyotype, chromosomes are arranged in 23 pairs. If we choose one of these pairs, such as pair 14, which of the following do the two chromosomes of the pair have in common?
23. How many different combinations of maternal and paternal chromosomes can be packaged in gametes made by an organism with a diploid number of 8 (2n = 8)?
24. When does the synaptonemal complex disappear?
25. Which of the following happens at the conclusion of meiosis I?

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