1. 1 Chromosomes and Mitosis Chapter 1 Thompson and Thompson

2. 1 Chromosomal Basis of Heredity A gene is a unit of heredity Genes are carried on DNA DNA is contained within chromosomes as chromatin

3. Chromosomes replicate during cell division

4. The chromosome complement

5. Chromosome analysis Cri Du Chat results from loss of a small piece of chromosome 5

6. Gene Map

7. Chromosome pairs

8. Non-identical genes

9. Sex chromosomes These determine the sex of an individual –Two X chromosomes make a female –One X and one Y a male

10. Two types of Cell Division Cells divide for two reasons –To create genetically identical copies of themselves This is mitosis – To create gametes that contain half of the chromosomes of the original cell This is meiosis 46 23 23 23 23

11. The Cell Cycle

12. S phase Replication Condensation Schematic

13. DNA replication Duplex DNA begins Replicating Replication bubbles merge creating two duplexes

14. Mitosis

15. The stages of Mitosis

16. Prophase Detail

17. Prometaphase

18. Metaphase

19. Anaphase

20. Telophase

21. The sum total of the process

22. Karyotypes

23. Chromosome Length

24. Chromosome appearance