Mitosis: Splitting Up is Complicated – Crash Course Biology #12

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Hank describes mitosis and cytokinesis – the series of processes our cells go through to divide into two identical copies.

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References for this video can be found in the Google document here:

Table of Contents
1. Mitosis 0:24
2. Interphase 3:27
a) Chromatin 3:37
b) Centrosomes 3:52
3) Prophase 4:14
a) Chromosomes 4:18
b) Chromatid 4:31
c) Microtubules 5:07
4) Metaphase 5:22
a) Motor Proteins 5:36
5) Biolography 6:13
6) Anaphase 9:00
7) Telophase 9:15
8) Cleavage 9:25
9) Cytokinesis 9:36

This video contains the following sounds from
“Swishes.wav” by Pogotron
“Opening Scotch Whisky.mp3” by Percy Duke

crashcourse, biology, mitosis, cell biology, cell division, cell, replication, splitting, chromosome, diploid cells, nucleus, DNA, prophase, metaphase, anaphase, telophase, interphase, chromatin, chromatid, centrosome duplication, centromere, microtubules, motor protein, walter flemming, tomomi kiyomitsu, dynein, cleavage, cytokinesis, daughter cells, science, education, college, university, learn, teach, hank green Support CrashCourse on Subbable:


Scholes “The PROcrastinator” IO says:

Here's my favourite pneumonic for mitosis (and meiosis):

I Poo Myself At The Cinema

Alex Thomas says:

whats happening with all the other organelles in a cell during this process?

Francesca Gill says:

this might save my university bio semester hahaha

Raghad lyfe says:

why he isn't my tutor :((((

Lily Castle says:

Just discovered this channel and it basically saved me and my entire biology class as well. Thank you!!

Luke Montgomery says:

Identical twin right here!!

Dean Ferraro, EA says:

I have a BS in Biology, now I do taxes and make $$$. Biologists fresh out of college make around $15-20/hr unless you have a phD, then you get to make $70,000. SOOO, be careful taking out big student loans, it might take awhile to pay back, unless you can do some self-mitosis and have your clone go to work too.

stylesgubler says:


sherina Mponji says:

He talks to much he should get right to the point and make it easier

lauren ! says:

I'm an identical twin haha but I'm on here b/c BIO test tomorrow!

Mayaa Kannan says:

talk slowly Hank

Scottington666 says:

Interphase-Prophase-Metaphase-Anaphase-Telophase…I-P-M-A-T…I Peed on a Mat.
This is how I remember the correct order.

strflyr78 says:

identical twin here

Andynator024 says:


Inayah Cee says:

Got a bio test in 2 days. Braces self for all-nighter studying

Quantisity says:

Welcome back to another episode of cramming with Crash Course!

Kelly Shields says:

i would like to personally thank this episode for saving my grade

George Maalouf says:

Is it not prophase is the longest of mitosis?

MissSweatpants I says:

I am an identical twin!!!!

Zack Price says:

This is actually my homework

Nicolas Gleason-Boure says:

Is anyone here who doesn't have a test and is just interested in biology?

Wei Shin Tan says:

nice video

Nina Kucheran says:

this video saved me literally

iono101 says:

I've learned this over and over again. I've already graduated with a BS in Human Biology but I still forget it lol. I hate cell division.

Imani Love says:

Kiss me now

medina lormejuste says:

Very helpful

master6339 says:

I was so confused by the use of the word chromosome to describe both the chromosome and the dual chromosomeThis puzzled me for so many weeksgood thing I learned 4 hours before my mid term

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