1. Finish Protein Synthesis Activity Protein Synthesis Exit Ticket
Objective:
I can explain the processes of mitosis and meiosis.
Agenda:
Finish Protein Synthesis Activity
Protein Synthesis Exit Ticket
Notes over mitosis
Mitosis Lab

2. Mitosis and Meiosis
Cell Division

3. Why Do Cells Divide? _____________________

4. Mitosis ______________________________________________________
In multicellular organism some of these cells perform functions different from other cells.

5. The process of a cell becoming different is __________________.
Under normal conditions once an animal cell becomes specialized it can no longer form an entire organism

6. When do cells divide?
Most limiting factor in size is the size of the cell membrane.
___________________
as volume increases, cell surface area does not increase as greatly
______________________________________________________

7. Cell Division vs. Nuclear Division
Cytokinesis: ____________________________________________
Mitosis: _________________________________________________
Note: Sometimes cells go through mitosis without going through cytokinesis.

8. Terminology
_____________ - thin fibrous form of DNA and proteins
Sister chromatids- identical structures that result from chromosome replication, formed during S phase

9. Anatomy of a Chromosome
p -arm
Centromere - point where sister chromatids are joined together
P=short arm; upward
Q=long arm; downward
Telomere-tips of chromosome
centromere
q-arm
chromatids
telomere

11. Cell cycle - ____________________________
How Do Cells Divide?
Cell cycle - ____________________________

12. Cell cycle has three parts:
Getting ready to split
Cell cycle has three parts:
_____________
(interphase)
mitosis (nuclear division)
cytokinesis (cytoplasm division)

13. Interphase
Occurs between divisions
_________________
3 stages

15. Interphase
G1 or Gap 1
The cell just finished dividing so in Gap 1 the cell is recovering from mitosis
_______________________

16. Interphase
S or Synthesis stage
DNA replicates

17. Interphase G 2 or Gap 2 ____________________
Organelles are replicated.

19. MITOSIS
Mitosis begins after G 2 and ends before G 1

20. Prophase
___________________________
Microtubles form
The nuclear envelope breaks down

21. Metaphase
________________________________________
Line up along “metaphase plate”

23. Anaphase
_______________
Spindle fibers pull one set of chromosomes to each pole
____________________________________

25. Nuclear envelope form around chromosomes __________________
Telophase
Nuclear envelope form around chromosomes
__________________
____________
animals - pinching of plasma membrane