1. Meiosis – the formation of sex cells
Sexual Reproduction
Meiosis – the formation of sex cells

2. Vocabulary Somatic Cell Gamete Homologous Chromosomes
Diploid Cells ( 2n )
Haploid Cells ( n )
Normal body cell
Sex cell – sperm or egg
Matching pairs of chromosomes
Cells that have homologous chromosomes (somatic cells)
Cells that have only one chromosome from each pair (gametes)

3. Which cell is diploid and which is haploid?
Haploid Cell
Diploid Cell

4. Mitosis vs. Meiosis Mitosis Meiosis Asexual Reproduction
Results in two genetically identical daughter cells
Creates diploid ( 2n ) cells
Involves one cell division
Sexual Reproduction
Results in four genetically different daughter cells
Creates haploid ( n ) cells
Involves two cell divisions

5. Prophase I Homologous chromosomes form a tetrad
Segments of chromatids are exchanged

6. Metaphase I
Tetrads line up at the center of the cell

7. Anaphase I Fibers pull tetrads apart
Haploid chromosomes move to opposite sides of cell

8. Telophase
Two haploid cells are formed

9. Prophase II
New fibers form and begin to connect to haploid chromosomes

10. Metaphase II
Chromosomes line up along the middle of the cell

11. Anaphase II
Chromatids of each chromosome separate and move towards opposite sides of the cells

12. Telophase II
Both cells divide to form four haploid cells containing half of the normal chromosome number.
Haploid cells turn into either sperm or egg cells depending on where they are formed.