CHAPTER 13

MEIOSIS AND SEXUAL LIFE CYCLES

Look over questions 1-6, 9 in the back of the chapter.
OBJECTIVES

1. Describe genes and their function*
2. Distinguish between asexual and sexual reproduction.*
3. Diagram the human life cycle and indicate where in the human body that mitosis and meiosis occur; which cells are the result of meiosis and mitosis; and which cells are haploid. *
4. List the phases of meiosis I and meiosis II and describe the events characteristic of each phase.*
5. Describe the process of crossing over during prophase I and explain how genetic recombination occurs.*
6. Describe key differences between mitosis and meiosis; explain how the end result of meiosis differs from that of mitosis.*
7. Meiosis was derived from mitosis. Where in the mieotic cycle do they show the most similarity? Meiosis I or Meiosis II? Explain why.
8. Compare the phases of meiosis I with mitosis and distinguish between the chromosomal arrangement during metaphase of both processes.*
9. Explain how independent assortment, crossing over and random fertilization contribute to genetic variation in sexually reproducing organisms.*

KEY TERMS
Heredity, genetics, variation, chromosome, life cycle, somatic cell, asexual reproduction, sexual reproduction, karyotype, homologous chromosomes, sex chromosomes, autosomes, diploid, haploid, gamete, fertilization, zygote, meiosis, meiosis I, meiosis II, synapsis, sister chromatid, tetrad, crossing over, chiasmata, independent assortment, clones.