https://www.khanacademy.org/science/ap-biology/cell-communication-and-cell-cycle/cell-cycle/v/mitosis 2023-12-04T19:02:25.924542584Z Mitosis Mitosis, a key part of the cell cycle, involves a series of stages (prophase, metaphase, anaphase, and telophase) that facilitate cell division and genetic information transmission. Centrosomes and microtubules play pivotal roles in orchestrating this complex process, ensuring the successful replication of cells. Sal Khan video https://cdn.kastatic.org/googleusercontent/TDqHqMvXm2B_9p-M1hqSnT1mRmZHzNMDGtwhJXBdf0z5rkPddF3WRsWlDXzLpz7vf2fZeOPeqJiHv3gyvXjhFsd8 Mitosis Mitosis, a key part of the cell cycle, involves a series of stages (prophase, metaphase, anaphase, and telophase) that facilitate cell division and genetic information transmission. Centrosomes and microtubules play pivotal roles in orchestrating this complex process, ensuring the successful replication of cells. https://cdn.kastatic.org/ka-youtube-converted/TKGcfbyFXsw.mp4/TKGcfbyFXsw.mp4 732 Cell Division (Mitosis and Meiosis) Uncontrolled cell division https://www.khanacademy.org/science/ap-biology/heredity/meiosis-and-genetic-diversity/v/phases-of-meiosis-i 2023-09-10T17:11:17.624018169Z Phases of meiosis I In meiosis I, cells go through four phases: prophase I, metaphase I, anaphase I, and telophase I. During prophase I, chromosomes pair up and exchange genetic material, creating more variation. In metaphase I, chromosomes line up in the middle of the cell. Anaphase I separates homologous pairs, while telophase I forms two new cells with a haploid number of chromosomes. Sal Khan video https://cdn.kastatic.org/googleusercontent/kF68gKxy_f5Ufz66szLJIK2Y6iOCxUNfGAea3J3T_v4vZ35rCUaAByLX4Xii-5jRpnd9GduVJIyse9NeYlMZiPofMQ Phases of meiosis I In meiosis I, cells go through four phases: prophase I, metaphase I, anaphase I, and telophase I. During prophase I, chromosomes pair up and exchange genetic material, creating more variation. In metaphase I, chromosomes line up in the middle of the cell. Anaphase I separates homologous pairs, while telophase I forms two new cells with a haploid number of chromosomes. https://cdn.kastatic.org/ka-youtube-converted/XGWL9jfPHJ8.mp4/XGWL9jfPHJ8.mp4 585 Cell Division (Mitosis and Meiosis) Uncontrolled cell division https://www.khanacademy.org/science/ap-biology/heredity/meiosis-and-genetic-diversity/v/phases-of-meiosis-ii 2023-09-10T17:11:17.624018169Z Phases of meiosis II Meiosis II is a process that helps cells divide and create gametes, which are needed for sexual reproduction. It starts with prophase II, where the nuclear envelope dissolves and chromosomes condense. Then, in metaphase II, chromosomes line up along the cell's middle. During anaphase II, sister chromatids separate and move to opposite ends of the cell. Finally, in telophase II, the nuclear envelope reforms, and the cell splits into four new cells, each with a haploid number of chromosomes. Sal Khan video https://cdn.kastatic.org/googleusercontent/2MZjJQ4JytlRXF7W89Cpfrqb0WSC0bLbr79fjutvWK2kWurKMndBOQHTcNepzvkpBiTJbDyq5YJjkhYo5vKwNOk Phases of meiosis II Meiosis II is a process that helps cells divide and create gametes, which are needed for sexual reproduction. It starts with prophase II, where the nuclear envelope dissolves and chromosomes condense. Then, in metaphase II, chromosomes line up along the cell's middle. During anaphase II, sister chromatids separate and move to opposite ends of the cell. Finally, in telophase II, the nuclear envelope reforms, and the cell splits into four new cells, each with a haploid number of chromosomes. https://cdn.kastatic.org/ka-youtube-converted/mMCcBsSAlF4.mp4/mMCcBsSAlF4.mp4 658 Cell Division (Mitosis and Meiosis) Uncontrolled cell division https://www.khanacademy.org/science/biology/cellular-molecular-biology/stem-cells-and-cancer/v/cancer 2023-12-04T19:02:25.924542584Z Cancer Cells replicate through a process called mitosis, making perfect copies of themselves. Sometimes, a cell's DNA can mutate during replication. Most mutations are harmless, but some can cause cells to grow uncontrollably, leading to cancer. Sal Khan video https://cdn.kastatic.org/googleusercontent/8Xnpz8UlKQ5Tmt5jmI7xeAnJb2IQkSJSrV67MRQRPNxo95ZCoREJO4bLwnnxJ1KXH3y1WYQ4LkheSvzovj5UzNqC Cancer Cells replicate through a process called mitosis, making perfect copies of themselves. Sometimes, a cell's DNA can mutate during replication. Most mutations are harmless, but some can cause cells to grow uncontrollably, leading to cancer. https://cdn.kastatic.org/ka-youtube-converted/RZhL7LDPk8w.mp4/RZhL7LDPk8w.mp4 756 Cell Division (Mitosis and Meiosis) Uncontrolled cell division https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:the-cell-cycle-and-differentiation/x230b3ff252126bb6:the-cell-cycle-and-mitosis/a/an-introduction-to-mitosis 2026-04-01T00:37:12.644935436Z An introduction to mitosis Learn about mitosis and how chromosome structure aids in the cell division process. article https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:the-cell-cycle-and-differentiation/x230b3ff252126bb6:the-cell-cycle-and-mitosis/a/the-cell-cycle-and-mitosis 2026-03-18T10:10:31.931963487Z The cell cycle and mitosis Learn about the stages of interphase and the mitotic (M) phase of the cell cycle. article https://www.khanacademy.org/science/cambridge-o-level-biology-cie/x2a084a90105205d2:development-of-organisms-and-continuity-of-life/x2a084a90105205d2:cell-division-mitosis-and-meiosis-uncontrolled-cell-division/a/hs-meiosis-review 2021-04-29T07:57:46Z Meiosis review article https://www.khanacademy.org/science/ap-biology/cell-communication-and-cell-cycle/regulation-of-cell-cycle/a/cancer 2023-11-17T18:36:38.577475749Z Cancer and the cell cycle How cancer can be linked to overactive positive cell cycle regulators (oncogenes) or inactive negative regulators (tumor suppressors).  article