Meiosis

1
Meiosis

• How are sex cells produced differently than body
  cells?

2
Where does meiosis happen?

• Meiosis occurs in the reproductive organs
• Produces the reproductive cells (sperm and eggs)

3
Before meiosis

• Chromosomes duplicate

4
Meiosis I

• Pairs of duplicated chromosomes randomly line up
  along the middle of the cell

• Duplicated chromosomes move away to opposite
  sides of cell

• Cytoplasm divides and 2 new cells form

5
Meiosis II

• Chromosomes line up along the center of the cell

• Two strands of each chromosome separate and move
  to opposite ends

6
Results of meiosis

• Four sex cells are produced

• Each sex cell has HALF the number of chromosomes
  of the parent cell

7
Sex cells
8
Comparing mitosis and meiosis
Mitosis Meiosis