Phases of Mitosis

[icetea751]

thank u

amazing explanation

[jamiepace]

you are amazing.thanks for dedicating your time teaching on youtube. wished my teachers were as good as you :)

[kingslate1]

i don't think he could have explained this any better this is excellent!!!! thanks

[MrWushyWushy]

Exam in 1 hour and 15 mins...

[ploy3snoy]

09:30 You said Centromeres when you should have said Centriomes.

[Ztuibyman]

Exam in 30 mins...

[mirnaadel94]

i needed this ! :D

[TheTeleportGaming]

You just saved this gamer from bankruptcy

[MrAMoosvi]

Exam in 2 days..

[strawssurfer13]

Frog Faces EVERYWHERE!



[friendsaremylife123]

You are my hero.

[gauravresearch8]

HI, Amazing vedio. Very well explained. Thanks a lot. 

[ttwizlerzz]

Thanks!!!!

[Rukeya89]

THANK YOU.

[003Strawberry]

awesome thanks

[1994yahoo]

9:30 - isn't it centrosomes, not centromereres?

[sant131313]

very helpful thanks i passed my semester test with this video.

[healthfreak18]

I'm a Bio Major and these videos are very helpful to me when I need to review some basic concepts. Thanks.

[DjVicK49]

My teacher sent my whole class here..

[WIlmylife]

damn,this guys really good but im so bummed because biology is now boring to me when ive been studying it or trying to do so and learn over 3 years of work in a little over a month

[LeandraRose1776]

It makes sense now!

[estabanflemons]

@NLx360 Organelles that exclude chloroplasts and mitochondria are "divided" into the two cell. It is done unequally however but it doesn't matter because the cell has the directions to produce more organelles. Chloroplast and mitochondria however replicate on their own indipendent of this process because they have their own DNA

[NLx360]

I understand for the most part what happens in mitosis and cell division, but when all this is happening, what is going on with all the other organelles? Do they replicate or what? Someone please help me.

[LeandraRose1776]

@NLx360 Each daughter gets at least one of each organelle. If there was only one of a given organelle prior to mitosis, it is divided between the two daughters. How each daughter get along with only only part of an organelle, is that the DNA in each of the cells has all of the information necessary to construct any organelles that the cell needs. Thus, the cells can build more of each organelle, and they can also complete any partial organelles that they have.

[christaffffa]

I Passed My Algebra Test Interphase Prophase Metaphase Anaphase Telophase

[glynch319]

I love how i understand Mitosis after 18 minutes and my teacher cant teach me it in a week

[LoveOneSV]

Interphase (we enter college) PMAT (Just like MCAT) That's how I learned it since I am doing premed. Hope it helps :D.

[clintneon]

Sorry but at 9:30, you said "centromeres"...isn't it supposed to be centrosomes? :O

[zixiz]

@clintneon you are correct. centromeres are the middle connective parts of the two chormatids.

[cutiepie4lifejustkno]

OMG THANK YOU SO MUCH! THAT WAS VERY HELPFUL :D

[mcomish17]

He loves the colour magenta.

[CristinasJuiceBox]

Can you like write what you say so i can learn it later?

[OfficialJakeCross]

See all of these people coming together to help eachother, this is the good side of youtube, the side without the trolls, a place where people can learn

[OfficialJakeCross]

this is helping so much, gash it is some much easier to learn from these videos

[DillPickle1995]

Plural of nucleus is nuclei... js!

[Zumerjud]

centrosome=centriole??

[MadmoneySunny]

I Pinch My A** Tightly.....thats a better way to remember it lol haa

[Albo623]

Scott u gave me hope, I actually am passing Bio thanks to you!!!!

[raXYZa]

he realizes his mistakes immediately! 

[ps3dude14]

wow thi was helpful thx dr. Scott

[Publicka]

PMAT:Prophase,metaphase and anaphase

[MrDGUY123]

@Publicka You forgot telophase

[Publicka]

@MrDGUY123 o.o Lool uh crap!

[seabladefly]

Go biology! the most boring subject ever!

[MW3CR]

He sounds like woodysgamertag

[pinkrose101s]

Its AMAZING how cells were created so intricatly! Praise be to God!

[Tw1stedLog1c]

wow extremely helpful thnx alot

[BlueMush]

what apps u use for this? i had final exam next week n all of your videos really help me.... Thanks many many many Lots...

[Kreighzey]

what is the point of school now? we could just watch these videos all day and learn what we would've leared in a year.

Common knowledge

[rapterass]

TRANSCRIBE AUDIO AT 12:33 AND IT SAYS "...SISTER CHROMA TITS"

[Pricee123]

@rapterass WE ALL CARE A LOT

[rapterass]

@Pricee123 hahaha go home dude :P

[MyRedHead314]

Thank you, thank you, thank you for your wonderful, amazing, exquisite, awesome, majestic, mind-blowing, beautiful, stunning, super-helpful videos!

[soccerjeremy11]

Why is school so inefficient. took me 20 min to learn what we covered in three hours of school

[earthgirl4ever]

Thank You!

[LilyLunaEvansPotter]

I learned more in 20 minutes than I did in a week of class. o_O

[xsuperumbrella]

Thank you so much! Why can't my professor explain it like this. He jumps around between phases and confuses me.

[willixtl1]

WHY CANT I HAVE A TEACHER LIKE YOU?!?!? I am a senior in college and i have procastinated against taking Bio because i HATE science, if i had more teachers like you and wouldnt try to show off their articulate vocabulary and prove to me why they are doctors in the field i might be able to make an A in the class. Your videos are a BLESSING thank you so much and i hope you realize how much help you really are to Bio students all over.

[guilol1]

Thank you so much for your videos! I have used many of them this semester, and they have been a great help!

[mariatricia13]

I clapped after watching this video.

[mariatricia13]

You are waaaaaayyyy better than our teacher.. Now I clearly understand EVERYTHING

[lavendertwilight08]

Diploid means 46 Chromosomes, right?

[fajitaboys]

@lavendertwilight08 Diploid means 2N, N meaning chromosomes

[BigMootsie]

hold on... at 18:29 you called the centrioles centromeres? i thought centromeres were what held the chromatids together? so much name confusion!

[naten9]

@BigMootsie He does that.. watch meiosis.

[BigMootsie]

@naten9 i just watched it and he does correct himself :p my bad

[GollaGandaLova]

Sal Khan = Jesus Christ for college students.

[Tacomaster521]

Wow, i think my teacher coppied everything you said, (yours was better though)

[sarahlavigne3]

Can you please come teach at my university?

[Jared6450]

I fucking love you.

[Ray93C]

getting headache watching your mouse moving here and there.. pls dnt move so much!

[Semyasei]

3:05 looks like a smiling face lol

[cmaskari1]

My teacher taught me this, to help me remember the phases:

Important People Make Awful Tea

lmaooo hope this helps you guys to remember this too :D

[xDevilicious]

@cmaskari1 thank you for that ! i always forget it.. but now i wont ! (:

[11Minerva]

@cmaskari1 you don't even realize how much this simple thing helped thank you soooo much!! :)

[11Minerva]

@cmaskari1 sorry to bother you, but does only apply to mitosis?

[lyricaltesting]

@cmaskari1 I was taught this:

I Pee on the MAT, it's so much easier to remember!

[wwefanworld]

@cmaskari1 thank you for that

[indietrekker]

@cmaskari1 or, I Pat My A** Twice. (taken from another video)

[mariodkm]

this sucks asia

[EdibleUnicorns]

your circles make me love yu.

[jaspercromwell]

Thank you for helping me study!

[TheRollingCubes]

You said "nucleuses"... That completely disrupted my learning.

[3rittni]

Your explanations are really good! You really help me a lot c: I just need to remember all the different things and not get them confused like centromere and centriole and centro- etc haha c:

[SarahG7985]

I have a test tomorrow morning on this. I hope i get a good grade because this test is the make it or break it for me

[so0shi03]

ummmm yeah you kind of just saved my grade. THANK YOUU!!!!

[ace814956]

dislexa nightmare



[shadyblue1000]

2:59 looks like a frog :O :D!!

[TheMjsvideos]

thankyou so much u just helped me a lot.

[Chromeo33]

So..... what's the difference between metaphase and the end of prometaphase/prophase?

[CrimsonFlameRTR]

I know you just didn't say nucleuses lol. Nuclei! I kid you, these are wonderful videos!

[Narutoneji100]

i have a question- How do u know so much?

[HashvilleSmoke420]

@Narutoneji100 Just Read...... Biology by Champbell and Reece is the popular text right now....

[Xhaterlover]

@Narutoneji100 He was on CNN apparently he graduated top of his class @ MIT & went to grad school @ Harvard (I think it was for engineering)...so basically, he's a genius who is awesome enough to want to share his knowledge with everyone. <3

[JIARULEX]

@Xhaterlover WOAH! Awesome dude! :D

[Xhaterlover]

@JIARULEX IKR!!!! XD

[jnet546]

@Narutoneji100 it's called staying awake in class LOL nah he's probably a Biology teacher or a chemist. he don't sound like a student more like a full grown adult.

[BlandiBoney]

Being a mix between an auditory and kinaesthetic learner this is so unbelievably helpful

[BurningToiletBowl]

"Mitosis" isn't exactly an "everyday term"...

[fandanstan]

I guess creation isn't really a crazy idea after all.

[yogert99]

thank you thank you thank you!

this helped so much

[daffodyllady]

Savaniel; If both daughter cells are the same age, then all four of the granddaughter cells will also be the same age... in fact, all the cells in our body would all be the same age, and we would have no preprogrammed cell death for individual cells. So, when does an individual cell begin its individual countdown? When it stops dividing?

[daffodyllady]

Question: From what point do we start counting, to count the beginning of a life of an individual cell? I have been taught that a cell will divide a limited number of times, and will then die. Which of the daughter cells is the new one, and which the older one?

[Savaniel]

@daffodyllady If I'm not mistaken, I believe they are both considered the same age. As both have some of the newly made as well as some some of the old chromosomes, neither is composed of entirely new parts. Both daughter cells are considered equal.

[mizzstargurl71]

Ahhh it works!! Thank goodness!!! I might actually do well on my test on Monday thanks to you!!

[mizzstargurl71]

The video is stopping at 13:08 for me. I am actually understanding this now (THANK YOU) but I can't seem to get it to play after this point :[

[normathompson27]

Thank You. Your videos are super helpful and you have a good voice to listen too as well!!!

[berthagen]

I understood your explanation better then the one my teacher gave me in my own language..

[BLR1GBattlemaster]

OOps, nevermind, I guess you address the chromatin issue at around 7:00-8:00.

[BLR1GBattlemaster]

Hey, just for accuracy, I think there is something wrong here. First, I appreciate the distinction between mitosis and cytokinesis! However, you are wrong to call the genetic material as CHROMOSOMES during Interphase. They are not technically chromosomes at this stage but CHROMATIN. They condense and coil into CHROMOSOMES during prophase.

[br3athable]

@Mathemagician95 centrosomes, and yes.

[BennoMedia]

i was really confused at the start of this because i have learnt that the centrosomes were spindle fibres, i picked up of that though. you are so much better than my biology teacher, she just opens up a powerpoint and goes through the slides letting us read it. no interaction what so ever. I wish you were my teacher :(

[whrebal]

Thank you for the clear understanding and the drawings. It is all so more clearer. Keep up the great work. You are very much appreciated.

[uvegtigris2010]

no they aren't the centromere at 18:37....they r the centrosomes but it is okay I mean if u pay attention than u know anyway that little mistake is not confusing.....

[flyemporio]

Thank you man... I really enjoyed that explanation ...

[FJBtheDAREDEVIL]

THIS REALLY HELPED!!! THANK UUU~~ *bows*

[syxysyxy]

You rock my world.

[rajr3500]

This video was so helpful. Thanks for uploading this. Keep up the good work

[aboo473]

9:30 You said centromeres when you meant centrosomes, just a correction

[BF1]

@aboo473 Yea he also likes to say nucleuses instead of nuclei, but when you make more than 2,600 educational videos you're forgiven for small errors that dont detract from the video.

[conorn555]

By far the the best channel of all time you have helped me out hundreds of times, thanks so much.

[heathy2324]

I just want to say, what you are doing for the online community is a true act of philanthropy that has helped me (and thousands of others) unlock my true potential as a student and possibly contribute to society one day.

[xqube]

That did help Aleksi! Nice

[Ukiringo1991]

ThanK you ~ Very Good Video Teacher

[TestosteroneDrone]

If I would have watched this 2 weeks ago, I wouldn't have had to go to class these last 4 classes...

[Leone982]

Why does this seem like a primary and not a supplementary source of learning? Keep going Mr. Sal! Learning a lot from you!

[bessyakabossy]

I love this guy forever!

[sunjz]

@bessyakabossy Totally agree!

[latresa7]

my teacher needs to be fired. Y didn't she say this?????

[WiltedGoddess]

I'm taking Biology online and this guy explains things way better than my teacher and actually sounds like he is enjoying it unlike my professor who just sounds bored. Thank you for making this video!

[bizzybozzy1]

I know this guy from some Chemistry lessons, he does Biology too? This guy is a beast!

[ironbeatboy]

Lol

[avonhill001]

this video is amazing...I understand it now, i might have to add a few points cuz my teacher is really detailed, but i understand it now!!

Mitosis= PMAT: Prophase (2N) -> Metaphase (2N) -> Anaphase (4N) -> Telophase (2N...2N), and then cytokinesis makes it 2 (2N)

amazing

[Sambrina139]

Thank you so much - you are helping so many students who don't have the allowance money to pay for fancy-schmansy programs that aren't as clear as this is! You have helped me understand this and be able to remember this SO much better!! Thanks a ton! :)

[TheBobsmithers]

The fact that you want to help build the minds of the future in understanding these subject and you do not put a price on knowledge, is a very noble act.

You are an amazing teacher, you've helped me out a whole lot through the last couple months and I thank you very much.

Your a great person, lots of respect.

[PetStuBa]

@FiddyDiddy96, there are 46 chromosomes (2 x 23 : because we are diploids , one we have from mom, the other from dad) , but there's a replication of the mom's chromosome and one of dad's chromosome, so you get 92 chromatides : 2 x 46)

[FiddyDiddy96]

how many chromosomes are there in the nucleus? and why do we use 2 chromosomes for the process, i thought there was more? like around 23?

[hassanibar]

thank you

[Gingerbreadaddict]

Thank you!

[JamesGmario]

Argh, If only I had found you earlier.. Writing my exam tomorrow.. You helped me majorly big time!!! You Rock....

[setagkeviv]

thanks,if it weren't for you i would have done horribly in my FIITJEE midphase exams

[BustaBeet]

the 11 people that disliked this probably failed yr 10 biology, dont worry about them

[foho123]

Did anyone look over to the right and look at "Phases of Meiosis" then saw that its 27 minutes long and almost fainted?

[luna1222cool]

Thank you for this video, it's so awesome. It has helped me to understand the whole process. 

[bear532]

Thank you so much for not just this video but all of them. You are making studying for the MCAT so much easier.

[swamporango]

nice vid easy to understnd if my teacher wasnt a dumbass maybe he could explain it the same way

[Natasha1993J]

Thank you so much for this tutoriall! It's so clear and simple to understand :D

[AutumnxDay]

I'm grateful and all..! Thanks alot ..

But what about spindles? o.o

[AutumnxDay]

@AutumnxDay LOL. Nevermind.

[buttt443]

thanks dude the helped alot

[xJamspasticx]

I Piss Myself After Telletubbies, how i remember it :P. Btw love your vids, so much help.

[TheYipedo]

I believe you made a mistake at 9:30. You called the centroSOMES centroMERES. Please correct it to avoid confusion. Aside from that, great video.

[jihanefuterpopstar1]

u can remeber it as i play music at the concert

[NubXilla]

alternatively 11:02 is the easy way around mitosis.

[NubXilla]

I was supposed to know this 3 years ago in grade 9. My bio final is in 2 days. You may be jesus.

[16medstudent]

very helpful video khan...well nothing new there. Thanks again!!

[SwimmingPython]

I'm confused. But I still like this video. :P

[Ladylyla]

So the green and purple chromosomes are homologus?

[adamyusoh13]

Indian-People-Must-Always-Try-­Cucumbers

[TR3v1001]

this makes sense its kind of hard to understand when ur teacher has u watch a 2 minute video lol

[myo95]

amazing explanation! thank you ! 

[OnetreehillLUVR123]

ur better than my teacher...

[saritahtams]

I still can't understand how it becomes 2n after anaphase

[derbigpr500]

@saritahtams I dont understand it either... it has 2N (46) in interphase before replication... does it then become 4N during interphase (92 chromosomes)??? So it then divides into 2 x 2N (46) during anaphase and telophese?

[saritahtams]

@derbigpr500 i think you got it right:)

[Svante111]

Another way to remember the mitosis is this rule:

Intelligent PeoPle Meet At Three o'Clock:

Interphase, Prophase, Prometaphase, Metaphase, Anaphase, Telophase and Cytokinesis.

Once you read this a couple of times, it will stuck! HF