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Mitosis: The Amazing Cell Process that Uses Division to Multiply! (Updated)

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Published on Apr 14, 2016

Updated Mitosis Video. The Amoeba Sisters walk you through the reason for mitosis with mnemonics for prophase, metaphase, anaphase, and telophase. Expand details to see table of contents.👇 Video handout here: http://www.amoebasisters.com/handouts

Table of Contents:
Why is Mitosis Important? 0:44
Why Don't You Want Cells Dividing all the Time? 2:00
Interphase (occurs before mitosis) 2:23
DNA and Chromosomes 2:55
Chromosome Replication 4:07
PMAT Mitosis Stages 5:30
Cytokinesis (actual splitting of cell) 7:30

We appreciate the feedback we get for what we need to clarify or should have added. Here is a clarification (also pinned in comments): (1) We mention mitosis as "a type of cell division." To be specific, it's a division happening within the cell - in the nucleus. But we do not introduce the nucleus until later on in video. Mitosis is specifically the division happening of the nucleus whereas cytokinesis follows to do the actual splitting of the cell (mentioned at 7:30). (2) Our video is intended to focus on animal cells (as drawn) - specifically human cells - as we use human chromosome numbers. We wish we had clarified that more as we appreciate the feedback that the statements, "Mitosis makes body cells. Meiosis makes gametes." has some big exceptions such as plants. (3) In metaphase, we do not draw a nucleus (6:09), because we mention it already has been disassembled. Disassembly of the nuclear membrane (envelope) occurs at the end of the previous stage. Many texts will state this is during prometaphase, a stage in between prophase and metaphase. In this short video, we do not include prometaphase. We only mention that the nucleus is no longer there by the time it's metaphase. (4) Notice our illustration in anaphase also includes a text box that says "sister chromatids separate" at 6:37. It's important to understand that chromosomes are moved "away" in anaphase, but as the text box notes, realize they are separated by the pulling apart of sister chromatids. This is especially important when comparing mitosis to meiosis I---as you can see our comparison video (which has more detail) here: https://youtu.be/zrKdz93WlVk

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The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching science at the high school level. Pinky's teacher certification is in grades 4-8 science and 8-12 composite science (encompassing biology, chemistry, and physics). Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. For more information about The Amoeba Sisters, visit: http://www.amoebasisters.com/about-us...

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