1. REVIEW CELL CYCLE

2. What are chromosomes
composed of? ________
DNA

3. Where are chromosomes found in the cell?
nucleus

4. Chromosomes/DNA contain ________ that are the instructions for making proteins.
genes
A gene is a section
of DNA that codes
for a protein.

5. How many chromosomes are there in human body cells?46

6. Interphase What are the three stages of the cell cycle? Mitosis
Cytokinesis

7. What happens during interphase?
The cell grows, works, and copies its DNA

8. What happens during mitosis?
The nucleus divides forming
two identical nuclei.

9. What happens during cytokinesis?
The cytoplasm divides forming
two identical cells.

10. 46 46 92 46 What happens during mitosis?
One cell divides to 46 46
DNA is
duplicated 92
cell
divides 46
one cell
Two identical cells
Same number of chromosomes!

11. MITOSIS 4
chromosomes
One cell
Two
identical
cells 4
chromosomes

12. MITOSIS produces
two cells with the same number
of chromosomes as the original cell
produces two identical cells

13. Interphase
DNA
duplicates

14. Prophase
The duplicated chromosomes condense.
cell

15. Metaphase
Chromosomes line up along
the middle of the cell.

16. Anaphase Chromosomes are pulled apart and
move to opposite ends of the cell.

17. Telophase The chromosomes gather at opposite poles
of the cell forming two nuclei.

18. Cytokinesis
The cytoplasm divides,
forming two identical cells.

19. interphase

20. prophase

21. metaphase

22. anaphase

23. telophase

24. cytokinesis

25. proteins How do cells know when to divide?
The cell cycle and cell division is regulated by
proteins

26. Cancer A disorder in which body cells lose the ability
to control cell growth and cell division.
Cancer

27. What causes cancers? A defect or mistake in a gene (DNA),
that results in a defective protein that
is not able to regulate the cell cycle,
and the cell divides uncontrollably.