• Document: Chapter 13: Meiosis and Sexual Life Cycles
  • Size: 353.21 KB
  • Uploaded: 2019-02-13 22:36:40
  • Status: Successfully converted


Some snippets from your converted document:

AP Biology Reading Guide Chapter 13: Meiosis and Sexual Life Cycles Fred and Theresa Holtzclaw Name__________________________Period___________ Chapter 13: Meiosis and Sexual Life Cycles Concept 13.1 Offspring acquire genes from parents by inheriting chromosomes 1. Let’s begin with a review of several terms that you may already know. Define: gene locus gamete male gamete female gamete asexual reproduction sexual reproduction 2. How many chromosomes are in human cells? What is a chromosome? 3. Which type of reproduction will result in genetically identical offspring? Concept 13.2 Fertilization and meiosis alternate in sexual life cycles 4. What is a somatic cell? Give examples of two human somatic cell types. 5. How does a somatic cell compare to a gamete in terms of chromosome number? Copyright © 2010 Pearson Education, Inc. -1- AP Biology Reading Guide Chapter 13: Meiosis and Sexual Life Cycles Fred and Theresa Holtzclaw 6. Distinguish between sex chromosomes and autosomes. How many of each are found in human cells? Explanation # in Human Cells Sex chromosome Autosome 7. What is a karyotype? How is it prepared? What are three things that can be determined from a karyotype? 8. Explain what is meant by homologous chromosomes. 9. Cells that have only one of each homologous pair are said to be haploid, a condition that is represented by n. Cells that have two of each homologous pair are said to be diploid or 2n. For each of the following, is the cell haploid or diploid? liver cell____________________________ gamete________________________________ egg_________________________________ zygote________________________________ skin cell_____________________________ sperm ________________________________ somatic cell__________________________ sex cell_______________________________ 10. The muscle cells of a dog have 78 chromosomes. Fill in the correct chromosome number in a: bone cell_______ sperm_______ haploid cell_______ somatic cell_______ zygote_______ Copyright © 2010 Pearson Education, Inc. -2- AP Biology Reading Guide Chapter 13: Meiosis and Sexual Life Cycles Fred and Theresa Holtzclaw 11. In the cell at right, the chromosomes are shaded in two colors to represent the parent of origin. On this sketch, label the following: a. sister chromatids b. homologous chromosomes c. centromere d. replicated chromosome e. maternal chromosomes 12. How many chromosomes does the cell above have? How many homologous pairs? How many chromatids? Is this cell haploid or diploid? 13. Where are the gametes of an animal produced? Be specific as to male and female gametes. 14. By what process are gametes produced? 15. What is another term for a fertilized egg? __________________What is the chromosome number of the fertilized egg? (Answer this in general terms, haploid, n, or diploid, 2n.) 16. What is the purpose of meiosis? 17. Study Figure 13.6. You will see that plants have a life cycle that involves spores, which form as a result of meiosis, so these spores are haploid. Notice also that both haploid and diploid cells can divide by mitosis. However, meiosis always begins with cells that are _________________, and as a result of meiosis, daughter cells are formed that are always _________________. These cells can be gametes (in animals) or spores (in plants). Copyright © 2010 Pearson Education, Inc. -3- AP Biology Reading Guide Chapter 13: Meiosis and Sexual Life Cycles Fred and Theresa Holtzclaw 18. Your study of plants this year will include knowing that they exhibit alternation of generations. What does this mean? What are the two generations? Which is haploid, and which is diploid? Use this information to label the moss life cycle here. Concept 13.3 Meiosis reduces the number of chromosome sets from diploid to haploid 19. What are alleles? Give an example. 20. In meiosis, the DNA is replicated during interphase, followed by two divisions. The first division is meiosis I. Study the events of prophase I as they are significant. Explain each of these events: synapsis PROPHASE I crossing over chiasmata 21

Recently converted files (publicly available):