1. Interactive Notes: pages
10-2 Cell Division
Interactive Notes: pages

2. Chromosomes Made up of DNA (genetic info.) and proteins
Each species has it’s own differing number of chromosomes
Fruit flies – 8 chromosomes
Humans – 46 chromosomes
Carrots – 18 chromosomes
Duplicated before cell division
Become visible during cell division

3. Parts of a Chromosome Chromatids: 2 identical “sister” sides
Centromere: where chromatids attach in the middle
Telomere: protective tip or end of chromosomes

5. The Cell Cycle
Events that the cell goes through as it grows and divides into two new daughter cells
Interphase- the period of growth between cell divisions
Four Phases
G1 (First Gap Phase)
S Phase
G2 (Second Gap Phase)
M Phase (Mitosis)

6. 4 Phases of the Cell Cycle
G1- cell increases in size and makes new proteins and organelles
S- chromosomes are duplicated and DNA is synthesized
G2- organelles needed for cell division are made
M- mitosis

8. 4 Phases of Mitosis REMEMBER----PMAT Prophase Metaphase Anaphase
Telophase

9. Prophase *Longest (50-60%) *Chromosomes become visible
*Centrioles separate & move to opposite sides of the nucleus
Spindles form
Nuclear envelope breaks down

10. Metaphase Chromosomes line up across the cell center
Microtubules connect centromere to the spindle

11. Anaphase Centromeres split
Sister chromatids separate and become individual chromosomes
Chromosomes move toward the poles

12. Telophase Chromosomes gather at opposite ends of the cell
New nuclear envelope forms around chromosomes

13. Cytokinesis Cytoplasm pinches in half
Each daughter cell has an identical set of duplicate chromosomes
In plants, a cell plate develops separating the membrane and a cell wall begins to appear

14. The Cell Cycle results in 2 identical DIPLOID daughter cells

15. Amoeba Sisters https://www.youtube.com/watch?v=gwcwSZIfKlM
Complete worksheet during video