AP Biology Mitosis and Meiosis Study Guide 1. You need to know how many chromosomes are found within a cell at any give phase of mitosis or meiosis. Example: if a cell starts with 60 chromosomes how many will it have during anaphase if it is undergoing mitosis. 2. Know how and when spindle fibers are formed and where they attach 3. You need to know what happens in all four phases of mitosis and all phases of meiosis 4. Know what phases of mitosis and meiosis contribute to genetic variation 5. Know how things such as crossing over etc. contribute to genetic variation 6. Know what centromeres and chromatids are 7. Know what the cell cycle is and what occurs in each stage of the cell cycle 8. Know how the cell cycle is regulated 9. Know what a cell plate is and how and why it is formed 10. Know what organisms reproduce sexually and which reproduce asexually 11. Know when chromosomes become visable 12. Know what a somatic cell is and how they are formed 13. Know what the genome is, and know what genes are