1. Meiosis
Biology

2. Meiosis
Meiosis is a two-stage form of nuclear division in which the chromosome number is halved.
This creates gametes
Gametes are reproductive cells- an egg or sperm

4. Meiosis I
The first meiotic division reduces the number of chromosomes by half.

5. Meiosis II
The second meiotic division separates identical copies of chromosomes.

6. Cell Division (Mitosis)
Meiosis is followed by cell division

7. Fertilization
When two haploid gamete unite in fertilization, the resulting cell is diploid.
It received one of each type of chromosome from the egg of the female parent and one of each type from the sperm of the male parent.

8. Crossing Over
During the first division of meiosis , the two members of each chromosome pair move together and line up side by side.
While paired together, the chromosome may exchange segments of DNA.
The exchange of corresponding segments of DNA is called crossing-over.
These new combinations of genes act as one source of variation within species.
This sort of genetic variation is necessary for natural selection to occur.

9. Crossing Over

10. Mitosis vs Meiosis

11. Mitosis vs Meiosis