Mitosis is a key function in your body that constantly remediates cuts, repairs cells and accomodates growth.   Key Words: Mitosis, Chromosomes, Diploid Cells, Haploid Cells, Prophase, Metaphase, Anaphase, Telophase, Centrosome Duplication, Chromatid, Centromere, Interphase 

Hank explains the first two phases of mitosis: Prophase and Metaphase.

Brian Cox explains the origin of the mitochondrial symbiotic relationship with the cell. He starts with introducing the nucleus and gives context to the early cell types - prokaryotes and eukaryotes. Brian then explains what scientists believe was the beginning of a symbiotic relationship where a bacteria enters an archaea. 

Hank explains the four phases of meiosis 1: prophase 1, metaphase 1, anaphase 1, and telophase 1. He accompanies his explanations with visualizations that illustrate each phase.

Hank explains that the process of meiosis 2 is exactly the same as mitosis, though the goal is different: instead of duplicating the double chromosomes, meiosis 2 pulls them apart into separate, single-strand chromosomes. Like meiosis 1, meiosis 2 has four phases: prophase 2, metaphase 2, anaphase 2, and telophase 2.