The document discusses cell division through the cell cycle, mitosis, and meiosis. The cell cycle consists of interphase (G1, S, and G2 phases) and mitosis, which produces two daughter cells with identical chromosomes to the parent cell. Mitosis involves four stages - prophase, metaphase, anaphase, and telophase. Meiosis produces haploid cells through two nuclear divisions and involves prophase I, metaphase I, anaphase I, telophase I, prophase II, metaphase II, anaphase II and telophase II.

1. Cell Division

2. The Cell Cycle
Mitosis
Meiosis

3. The Cell Cycle

4. • G1 (Growth Stage) – the
organelles start to double in
number.
• S (Synthesis Stage) – the
DNA strands replicate.
• G2 (Growth Stage) – more
protein is made.

5. Mitosis
• A process of cell division herein
two new daughter cells receive
exactly the same number of
chromosomes as the parent cell.
• It includes four stages namely:
Prophase, Metaphase, Anaphase
and Telophase.

6. The Process of Mitosis

7. Prophase
• The nucleus
disappears.
• The nuclear
membranes
breakdown and
disappears.
• Centrioles move
toward the opposite
poles.

8. Metaphase
• Chromosomes move
toward and alignment
at the center of the
cell.
• Centromere of
chromosomes
attaches itself to a
spindle fiber.

9. Anaphase
• Chromatids separate
and each pair is
pulled to each pole.
• Cell membrane
begins to pinch
together at the cell’s
center.

10. Telophase
• The nucleolus and
nuclear membrane
appears.
• Chromosomes uncoil
and become chromatin.
• Cell membrane
completely pinches and
centrioles replicate.

11. Meiosis
• A cell division of diploid cells
that produces haploid cells like
sex cells.
• It require to nuclear division:
Meiosis I and Meiosis II.

12. Process of Meiosis

13. Meiosis I
Prophase I • The nucleus membrane and nucleolus disappears
• Spindle fibers begin to form.
Metaphase I • Crossing – over between the homologue pair happens
• Spindle fibers completely form
Anaphase I • Homologues of each pair split and move to the opposite
sides, the chromosomes number on each side is half the
original number
Telophase I • The nucleolus appears
• The nuclear membrane form
• Pinching of the cell membrane is completed so there are
two ne cells

14. Meiosis II
Prophase II • Spindle fibers begin to form
• The nuclear membrane breaks
Metaphase II • The chromosomes align at the center
• Spindle fibers form completely
Anaphase II • The chromatids of each chromosomes are pulled
apart and move toward opposite sides
Telophase II • The nuclear membrane appears

15. References
• Olivares, Maria, et. al. Science
and Technology for the modern
world. Textbook for second
year. 2003. DIWA Scholastic
Press Inc. Makati City