1. A different kind of cellular division
Why Meiosis??
A different kind of cellular division

2. Meiosis

3. Meiosis – cell division to produce gametes (sex cells)
Female gamete = egg cells
Male gamete = sperm cells

4. How are gamete cells different from somatic cells?
Gametes are haploid cells with half the genetic material (1n).
Somatic cells are diploid (2n)

7. How to get half…
In meiosis cells divide two times, but the chromosomes only replicate once.
This results in four haploid cells with ½ the DNA.

8. Meiosis: 2 cell divisions

9. Why do you need half?
Gametes join (fertilization) to make the next generation (offspring).
1n sperm + 1n egg = 2n somatic body cell
Mitosis brings that first cell through growth and development to an embryo, infant, child…etc.

11. Meiosis Video
Cornell Summary