Cells

Mitosis is the division of the nucleus in eukaryotic cells. This is important for life to survive in order to replenish worn out cells in multicellular organisms, and for reproduction in unicellular organisms. In this lecture, you will discover the process of the cell cycle with special emphasis on the division of the nucleus, mitosis.

Meiosis is the production of gametes, sex cells. In meiosis, the DNA is split in half. This is important because fertilization combines the gametes of different organisms, and if meiosis didn't occur, the amount of DNA in a cell would quickly become too abundant to allow for efficient handling of cell function.