1. Source : Genetics Home Reference

2. Source :http://publications.nigms.nih.gov/thenewgenetics/chapter1.html#c1 http://www.yourgenome.org/teachers/origami.shtml

3. WALT know what DNA is DNA stands for deoxyribonucleic acid. What is DNA made of? DNA is made up of nucleotides. Four types of nucleotides: A- adenine T- thymine C - cytosine G – guanine Nucleotides are held together by a backbone made of phosphate and deoxyribose. The nucleotides are sometimes referred to as "bases". The double helix structure was discovered by Watson and Crick in 1953.

4. kinetochore Source :http://y12hb.wordpress.com/

5. Source : newscenter.lbl.gov

8. Homework : Explain what is apoptosis?apoptosis Cell Cycle

9. The genetic purpose of mitosis is to produce two daughter cells that are genetically identical to the parent cell. Reasons for mitosis – reproduction and replacement of cells. Problems with this process can seriously damage or kill cells.

10. Viewing mitosis in onion root tips! Using onion root cells to view mitosis

11. region of cell elongation region of cell division protective root cap

12. Viewing mitosis in onion root tips! Why use onion roots? easy to grow in large numbers cells at the tip actively dividing cells are in stages of mitosis chromosomes can be stained to make them more easily observable

13. Make a squash preparation

14. Take a closer look!

19. What is mitosis?

20. Interphase Prophase Metaphase Anaphase Telophase Cytokinesis Stages of cell cycle : I Pray Mainly At The Church!

21. Stages in mitosis : Prophase, Metaphase, Anaphase and Telophase