3.3 Lecture 6: Meiosis-2

3.3.1 Lesson outline
meiosis illustration 1
meiosis illustration 2
meiosis illustration 3
  1. interphase
  2. Homologous chromosomes
  3. breaks
  4. middle
  5. Spindle
  6. homologous
  7. Sister chromatids
  8. two
  9. Sister chromatids
  10. Chromosomes; Nuclear membrane
  11. align
  12. pulled apart; opposite ends of the cells
  13. chromosomes
  14. four
  15. half

3.3.2 Homework

Multiple Choice Questions
1. A
2. C
3. C
4. D

Short Answer Questions
(6 points maximum) One point for each of the following:

  • Correct description of meiosis
    Germ cell is a diploid cell, and goes through meiosis to produce gametes, which are haploid cells.

  • DNA replicates in interphase
    DNA replicates in interphase, and each chromosome then has a pair of identical sister chromatids.

  • Homologous chromosomes pair in prophase I

  • Spindle fibers move chromosomes pairs to poles in anaphase I
    In the end of meiosis I, two daughter cells are produced, and their chromosomes are halved.

  • Two cycles/rounds of division in meiosis

  • No additional replication before meiosis II

  • Sister chromatids separate to poles in anaphase II
    Separation of sister chromatids doesn’t change the number of chromsomes. The daughter cells are still haploid cells.

  • 1 germ cell yields 4 gametes
    4 gametes, which are haploid cells, are produced in the end of meiosis.

Fill in the Blanks
1. Anaphase II
2. N/A
3. Metaphase I
4. Telophase II (not quite obvious)
5. Telophase I (not quite obvious)
6. N/A
7. Metaphase II
8. Prophase I
9. Prophase II
10. Anaphase I