The document contains instructions for students to: 1. Draw diagrams of cells at different stages of mitosis, including interphase before and after S phase, prophase, metaphase, anaphase, and telophase. 2. Fill out a chart describing changes in molecules, chromosomes, chromatids, and homologous pairs at each stage. 3. Perform a practical activity examining onion root tip cells to identify and count cells in interphase and each mitosis phase.

1. 1. Read the contents on pages 31, 32 and 33.
2. Colour the black and with sketch on page 65.
3. Make the activities on page number 33.
4. Follow these instructions:
** Draw a cell with four Molecules of DNA. Two come from the father and the other
two, come from the mother. Draw one big molecule and the another one smaller. Use
red colour for Father molecules and blue colour for mother molecules.
Each molecule will represent a Chromosome.
** Draw the cell in Interphase before S period. (BS)
** Draw the cell in Interphase after S period.(AFS)
4. Imagine that this cell suffers the Mitosis:
** Draw the cell in Prophase condensing the Chromosomes. What Happens inside the
Cytoplasm? Draw the Spindle.( Previous PRO)
** Draw the Cell in Prophase a little time before Metaphase.(Late PRO)
** Draw the cell in Metaphase.(MET)
** Draw the Cell in Anaphase.(ANA)
** Draw the DAUGTHER CELLS during Telophase.(TELO)
5. Fill out the following chart.
MITOSIS AND CYTOKINESIS

3. IN.BS IN.AFS MPrePro MLatPro MMet MAna MTel
Mole
DNA
Chromo
Chromat
Homolog.

4. IN.BS IN.AFS MPrePro MLatPro MMet MAna MTel
Mole
DNA
4 8 8 8 8 4 4
Chromo 4 4 4 4 4 4 4
Chromat 4 8 8 8 8 4 4
Homolog.
Pairs
2 2 2 2 2 2 2

5. PRACTICAL ACTIVITY Nº2.IDENTIFY MITOSIS PHASES.
Biological Material Onion Root tips.
Onion Root Tips
Interphase Prophase Metaphase Anaphase Telophase TOTAL
Work out the
percentage of Cells in
Mitosis and Interphase.
Study carefully the
pictures on next pages.
INTERPHASE
MITOSIS

6. 1

7. 1
Interphase Prophase Metaphase Anaphase Telophase TOTAL

8. 2

9. 2
Interphase Prophase Metaphase Anaphase Telophase TOTAL

10. 3

11. 3
Interphase Prophase Metaphase Anaphase Telophase TOTAL

12. Picture Interphase Prophase Metaphase Anaphase Telophase TOTAL
3
2
1
INTERPHASE
MITOSIS
1
INTERPHASE
MITOSIS
2
INTERPHASE
MITOSIS
3
COMPARING CELLULAR DIVISION BY MITOSIS