Across
- 2. 2 words. a membrane that forms midway between dividing plant cells during cytokinesis and later becomes the cell wall.
- 7. characteristic of malignant tumours of transferring the disease from one organ to another not directly connected with it.
- 8. the division of the cytoplasm and the plasma membrane, following the division of the nucleus, resulting in two cells in mitosis.
- 11. 2 words. a type of asexual reproduction common among prokaryotes where one cell divides giving rise to two cells, each having the potential to grow to the size of the original cell.
- 13. index the ratio between the number of cells in mitosis to the total number of cells.
- 14. twisting in the opposite direction to the turns of the double helix during the first stage of mitosis.
- 15. the region joining the two sister chromatids where it becomes attached to the spindle fibres.
- 17. 2 words. two identical strands of DNA joined by a common centromere.
- 19. general term for more than 100 diseases that are characterized by uncontrolled, abnormal growth of cells.
- 20. a self-replicating cylindrical organelle that is involved in the process of nuclear division.
- 21. abnormal proliferation of cells, either benign or malignant.
- 22. a gene that causes normal cells to change into cancerous tumour cells.
Down
- 1. stage in mitosis in which chromosomes become arranged at the equatorial plate.
- 3. the final stage of mitosis in which the separated chromosomes reach the opposite poles of the dividing cell and the nuclei of the daughter cells form around them.
- 4. 2 words. the figure formed by the chromosomes in the centre of the spindle during mitosis.
- 5. a family of closely related proteins that regulate the cell cycle in eukaryotic cells.
- 6. first stage of mitosis during which the chromosomes become visible as paired chromatids and the nuclear envelope disappears.
- 9. 2 words. network of filaments that collectively form a mitotic spindle in mitosis. They are involved in moving the chromosomes during nuclear division.
- 10. chemical agents that increase the rate of genetic mutation.
- 12. fibres hollow protein tubes seen during the mitosis of animal cells.
- 16. linear strand of DNA bonded to proteins in the nucleus of eukaryotic cells that carries the genetic information.
- 18. the process where a single cell divides into two identical cells, each containing the same number of chromosomes and genetic content as that of the original cell.
