1. You have 10 minutes to finish your assignment from yesterday
You have 10 minutes to finish your assignment from yesterday! If you are done, study for you exam tomorrow

2. The Cell Cycle S Mitosis G1 G2 Interphase Telophase Anaphase Prophase
Metaphase

3. Big picture: We need to make more cells

5. Interphase
Cell Grows and replicates DNA

6. S phase replicates DNA
Interphase G1 S G2

7. Here is what DNA looks like in chromosome form

8. So if I have two chromosomes and I replicate them
Replicates

9. If I have 10 they go through S phase….
DNA Replicates

10. So if humans have 46 then they are replicated….

11. We have an issue… too much chromosome for one cell
Now we will begin the process of splitting the replicated chromosome( ) and making 2 IDENTICAL cells
PMAT

12. Now Mitosis Begins Prophase: Chromosome Appear, nucleus breaks down

13. Metaphase- Chromosomes Line up so they can be split
Where’s the nucleus??

14. Anaphase-Chromosome Split
Where’s the nucleus??

15. Telophase
2 nuclei

16. Cytokinesis

17. If I have 46 chromosome before mitosis starts, how many do I have afterwards???

18. If this potato has 32 Chromosome before mitosis, how many after??
32!

19. If Jerry has 987 chromosomes before mitosis how many after mitosis?

20. Mitosis
Used for Growth and repair

21. How many cell divisions??? 2
Meiosis
How many cell divisions??? 2

22. Notice the homologous pairs line up NEXT to each other
Crossing Over

23. Crossing Over leads to increased__________
Genetic Diversity

24. Meiosis leads to the production of _________
Specifically….
Gametes

25. 46 23 23 23 23

26. So if Forrest Gump has 48 Chromosomes… How many in each gamete after meiosis?24

27. If Patrick has 102 chromosomes before Meiosis how many in each gamete after?51

28. Cancer is _____________ Cell growth
Uncontrolled

29. DNA fingerprinting… who did it?

30. Where is the trisomy??
Trisomy 21

31. What is this process called?
Transcription
mRNA