9. MEIOSIS

General Biology Hub LECTURE LEARNING TOOLS

9.1. INTRODUCTION

9.11. Cell division differences in living organisms

9.11.1. eukaryotes
9.11.2. prokaryotes

9.12. Reproduction differences in eukaryotes

9.12.1. asexual reproduction
9.12.2. sexual reproduction

9.13. Chromosome number differences in human cells

9.13.1. diploid number (somatic cells)
9.13.2. haploid number (sex cells)

9.2. PRODUCTION OF SEX CELLS

9.21. General overview

9.22. Females (Oogenesis)

9.23. Males (Spermatogenesis)

9.3. MEIOSIS

9.31. Stages of mitosis

9.4. NONDISJUNCTION

9.5. GENETIC VARIATION

9.51. Meiosis vs. Mitosis

9.52. Genetics

9.53. Origin of genetic variation

9.53.1. Mutations
9.53.2. Sexual reproduction
9.53.3. Genetic drift
9.53.4. Migration
9.53.5. Natural selection

LECTURE OBJECTIVES (instructional goals)

AT THE END OF THIS LECTURE, YOU SHOULD BE ABLE TO:

  1. Describe binary fission in bacteria, and distinguish this process from cell division in eukaryotes.
  2. Explain why sexually reproducing organisms must form cells with haploid number of chromosomes.
  3. Describe the stages in meiosis I.
  4. Describe the stages in meiosis II.
  5. Compare mitosis and meiosis; cite similarities and differences.
  6. Recognize the effect that meiosis has on chromosome number.
  7. Compare sex cell production in males and sex cell production in females; cite similarities and differences.
  8. Explain how nondisjunction (e.g., trisomy) results from errors in the meiotic process.
  9. Explain how genetic variation is generated.
  10. Define selected key terms.

KEY TERMS

See separate page.

TRY THIS QUESTION:

After meiosis, the chromosome number of each of the four resulting sex cells cell is __________ the primitive sex cell's.

a. the same as
b. one-half
c. doubled compared to
d. tripled compared to
e. none of the above

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Page created 29.XII.1997, last updated 09.IX.2000. © 1997, 1998, 1999, 2000. Jan A. Nilsson, desertbruchid@hotmail.com