1. Cell division SQA questions

2. What you should know Cell division is a means of i_________ the number of c____ in an organism Nucleus of the cell controls c___ a______, including c____ d_______ E___ of the t___ cells produced by cell division has a complete set of c__________ and the s_____ information. This ensures there is no l____ of g______ i________ in the t___ new b____cells ncreasing ells ellctivities ellivision achwo hromosomesame ossenetic nformation woody

3. Cell division occurs in ____ stages Division of the c_________ and division of the nucleus called m_______. Before the nucleus divides each chromosome is c_____ so there is a copy chromosome (c_________) for e___ of the two new cells The copy chromosomes are held together by a c__________ and are called c__________ two ytoplasm itosis opied hromatidach entromere hromatids

4. original chromosome copy chromosomes chromatids centromere

5. _______ copy chromosomes (chromatids) _____chromosomes in e____ n___ c____ and ___ chromosomes were in the original p________ b____cell 6 3 achewell 3 arent ody

6. _______ copy chromosomes (chromatids) _____chromosomes in e____ n___ c____ and ___ chromosomes were in the original p________ b____ cell 4 2 achewell 2 arent ody

7. _______ copy chromosomes (chromatids) _____chromosomes in e____ n___ c____ and ___ chromosomes were in the original p________ b______cell 6 3 ach ew ell 3 arent ody

8. _______ copy chromosomes (chromatids) _____chromosomes in e____ n___ c____ and ___ chromosomes were in the original p________ b_____cell 8 4 achewell 4 arent ody

9. What is the correct order? XWYUV

10. U YWV X

11. BDAEC

12. C B AD E

13. Describe what is happening Draw or describe what happens next 1 Nuclear membrane disappears. Chromosomes being copied Copy chromosomes (chromatids ) appear

14. Describe what is happening Draw or describe what happens next What type of cell is this? Animal or plant Animal Cytoplasm dividing by tucking in. Two cells are formed

15. Copy chromosomes (chromatids) have formed 4 Copy chromosomes (chromatids) line up at the equator of the spindle Describe what is happening Draw or describe what happens next

16. Describe what is happening What type of cell is this? Animal or plant ? Plant New cell wall forms between the two new cells

17. Describe what is happening Draw or describe what happens next Copy chromosomes (chromatids) lined up at the equator of the spindle Spindle separates the copy chromosomes (chromatids)

18. Describe what is happening Draw or describe what happens next The copy chromosomes (chromatids)are being separated New nuclear membranes form round copy chromosomes. New cell wall forms

20. 4

25. mitosis Chromosomes (chromatids) are being pulled apart to opposite ends of the cell To make sure there is no loss of genetic information (genes) in the new cells

27. mitosis New cell wall developing Division of cytoplasm Chromosomes becoming visible Nuclear membrane breaking down To make sure there is no loss of genetic information (genes) in the new cells