1. Cells & DNA Make a foldable to organize your notes

2. http://web.jjay.cuny.edu/~acarpi/NSC/13-cells.htm

3. DQ: Warm-up Question List the components of the cell that control traits from smallest to largest. Cells

4. Searching for DNA? (pp. 42-43) The DNA of a cell is organized into structures called chromosomes. Body cells have 23 pairs (46 total) One half the genetic instructions comefrom the father, the other ½ from the mother Made up of approximately 60,000 genes Genes control traits

5. Chromosomes p. 43 & 91 http://www.tutorvista.com/content/biology/biology-iii/chromosomes/chromosomes-structure.php http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1054885

6. Boy or Girl? P. 73

7. DNA p. 89 DNA Molecule –Sugars outer frame of “ladder” Nitrogen bases for rungs of “ladder” –AdenineGuanine –CytosineThymine The Order of the bases determines the genetic code.

8. Chromosomes are made of twisted strands of DNA. Chromosomes are in the nucleus. The nucleus is in the cell. Organisms are made of millions of cells.

9. Mitosis pp. 44-45 Process of cell duplication in body cells. Purpose: Growth and Repair Exact copy of the original cell is made Then it divides into 2 http://www.biology.arizona.edu/Cell_bio/tutorials/cell_cycle/cells3.html http://www.cellsalive.com/mitosis.htm

10. Meiosis pp. 70-71 The process of cell duplication in sex cells Purpose: reproduction Chromosomes separate and go into 2 different cells Egg & sperm cells have ½ as many chromosomes as body cells. http://www.biology.arizona.edu/CELL_BIO/tutorials/meiosis/meiosis1_movie.html http://www.cellsalive.com/meiosis.htm

11. X / X \ \ Mom Egg Cell Sperm Cell ½ of the genes come from mother ½ of the genes come from father Dad