1. Meiosis

2. Meiosis vs. Mitosis
Homologous chromosomes – paired chromosomes in a diploid cell.
Receive one from the mother and one from the father

3. Meiosis vs. Mitosis Mitosis Meiosis
Begins with a Diploid cell - 2n (cell with two copies of each kind of chromosome)
End with a diploid cell
Cells contain the same number of chromosomes as the original cell
Meiosis
Begins with a Diploid Cell - 2n (cell with two copies of each kind of chromosome)
End with a haploid cell – n (a cell with one kind of each chromosome)
Cells contain half the number of chromosomes as the original cell

4. Meiosis vs. Mitosis

5. Mitosis vs. Meiosis Mitosis Meiosis Ends with a body cell
Ends with a gamete or sex cell (Ex: sperm or egg)

6. Meiosis vs. Mitosis Mitosis Meiosis
Goes through each stage once (prophase, metaphase, anaphase, and telophase)
Meiosis
Goes through each stage twice (prophase I, metaphase I, anaphase I, telophase I, phrophase II, metaphase II, anaphase II, and telophase II)

7. Mitosis vs. Meiosis

8. Mitosis vs. Meiosis Mitosis Meiosis Get two new cells
Get four new cells

9. Crossing over occurs during meiosis, but not mitosis
Produces gametes that contain half the number of chromosomes as the parent’s body cell.
Crossing over occurs during meiosis, but not mitosis
When homologous pairs exchange genetic material

10. Crossing Over

11. Zygote – cell that forms when the sperm cell fertilizes an egg cell