| A | B |
|---|
| Crossing Over | Happens during prophase I when homologous chromosomes exchange parts. |
| Gametes | Reproductive/Sex cells/egg cell/sperm cell. They contain 23 chromosomes. |
| Haploid cells | 1N=23. A cell that contains one set of chromosomes. |
| Difference between Mitosis and Meiosis | Mitosis has one division and produces diploid cells. Meisosis has 2 cell divisions, and makes 4 haploid sex cells. |
| Body cells | Cells that contain 46 chromosomes |
| Tetrads | Form during prophase I when homologous chromosomes match up together. |
| Prophase I | Chromosomes condense and the nuclear membrane starts to disappear. Homolgous chromosomes pair up and form tetrads. Crossing over happens. |
| Metaphase I | Homologous chromosomes line up down the middle of the cell. |
| Anaphase I | Homologous chromosomes move to opposite ends of the cell. |
| Telophase I | Cell spits and two cells form, each with double stranded chromosomes. |
| Interkinesis | Resting period where DNA does not replicate again. This happens inbetween Meiosis I and Meiosis II |
| Prophase II | Chromosomes condense and the nuclear membrane disappears. |
| Metaphase II | Chromosomes line up in a single file line down the middle of the cell. |
| Anaphase II | Sister chromatids move to opposite ends of the cell. |
| Telophase II | Cells split to form 4 daughter cells. |
| Chromatid | One double stranded chromosome is made up of 2 sister chromatids |
| Zygote | When the sperm fertilizes the egg, a zygote is formed. This is diploid. |
