1. Do now 4/24
Get out your review questions from Friday

2. Biology eoc review

3. Chapter 5 – the cell cycle & mitosis
20. When does the duplication of DNA occur? 21. What is a cell doing during the GI and G2 periods? 22. What happens during cytokinesis? 23. If the cell cycle is controlled by enzymes, what might result if the genes that control the production of these enzymes are damaged?
S phase during Interphase
G1: cell growth;
G2: cell prepares to divide
The cytoplasm divides
The cell could not control its growth rate and
would continue to divide – leads to cancer

4. Anaphase Prophase Interphase Telophase Metaphase
24. put the following stages of mitosis (cell division) in order: I-P-M-A-T
Anaphase
Prophase
Interphase
Telophase
Metaphase

5. Tetrad line up in the middle
25. Describe in words what happens at each stage of meiosis. a. b. c. d. E. 26. What kind of cells undergo mitosis? somatic cells-body cells
Interphase:
DNA replication
Homologous chromosomes pair up forming a tetrad.
Prophase:
Metaphase:
Tetrad line up in the middle
Anaphase:
Homologous chromosomes pull apart
Telophase:
two new cells form

6. 27. Explain why meiosis is important for sexual reproduction.
28.What kind of cells are formed from meiosis?
Dividing cells from diploid to haploid allow fertilization to produce viable offspring.
Independent assortment during anaphase I and crossover both increase genetic diversity.
Haploid gametes (males make sperm, females make eggs)

7. Complete the following table about mitosis:
Mitosis
Type of Reproduction (asexual or sexual)
Chromosome number of parent cell
(1N=haploid or 2N=diploid)
Chromosome number of daughter cells
Number of Cell Divisions
Number of Daughter Cells
When does DNA replication take place?
Asexual 2N 2N 1 2
Interphase

8. Sugar, phosphate group, Nitrogenous base
Chapter 8 – DNA & RNA
30. To the right is a strand of DNA. Give the complementary nucleotide sequence needed to make this a double helix.
31. What are the 3 parts of a nucleotide?
Sugar, phosphate group, Nitrogenous base
32. What are the black pentagons? What are the PO4’s?
33. What kind of weak bonds hold the two strands of DNA together?
34. What part of the DNA codes for our traits?
The order of the nitrogenous bases
T – C – G – G – T - C
Deoxyribose sugar
Phosphate groups
Hydrogen bonds

9. STORES GENETIC INFORMATION/INSTRUCTIONS
42.
DNA
Sugar
DEOXYRIBOSE
Bases
A,T,C,G
Number of strands 2
Location
NUCLEUS
Function
STORES GENETIC INFORMATION/INSTRUCTIONS