7. The leader of first group is Ahmed We Shared with each other to collect Information about cell division from Science books.

8. The cell division is two types 1- mitotic division 2- meiotic division

9.  1- Somatic cells  In all body cells except reproductive cells Ex : cells of ( liver – skin ………….) 2- reproductive cells In reproductive systems Ex : Testis – ovary cells

10. The nucleus Because that contain genetic materials

11. General structure of chromosome

12. Two connected threads,each thread Called a chromatid The two chromatids connected at point known as Centromere

13. The leader of second group is Ghada We Shared with each other to collect Image about mitotic & meitotic division from internet.

15. The leader of third group is Arwa We Shared with each other to download Videos about mitotic & meiotic division from internet.

18. The leader of fourth is Mohamed We Sheared with each other to Make presentation by power point about the unit.

20. The cell division is two types 1- mitotic division 2- meiotic division

21.  1- Somatic cells  In all body cells except reproductive cells Ex : cells of ( liver – skin ………….) 2- reproductive cells In reproductive systems Ex : Testis – ovary cells

22. The nucleus Because that contain genetic materials

23. General structure of chromosome

24. Two connected threads,each thread Called a chromatid The two chromatids connected at point known as Centromere

33. The chromosomes connected with spindle fibers are arranged along the cell equator.

42.  1- First meiotic division.  consists of 4 phases it produces two cells  contain half the numbers of  chromosomes.  2- Second meiotic division.  consists of 4 phases it produces four cells  contain half the numbers of chromosomes.

43.  Prophase Ī  Metaphase Ī  Anaphase Ī  Telophase Ī

46. *The spindle fibers shrink, so every two homologous chromosomes move away from each other. *Each two chromosomes migrates to the cell pole, each pole contain half the number of chromosomes of the parent cell.

47. *The spindle fibers disappear. *A nuclear membrane is formed around the Chromosomes at each cell’s pole. *Each nucleus contains half the original number of chromosomes.

48.  Prophase ĪĪ  Metaphase ĪĪ  Anaphase ĪĪ  Telophase ĪĪ