Mitosis | Cells | MCAT | Khan Academy
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- เผยแพร่เมื่อ 21 ก.ย. 2024
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Mitosis is how cells divide! Learn what happens in all the phases of mitosis: prophase, metaphase, anaphase, and telophase.
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I love when you hear him nerding out getting all excited explaining why something is important.
Same bro i like the way he talk
Exactly
what I learned from this video:
chromosomes are not magenta colored
centrosomes are not to be confused with centromeres
These videos are SO incredibly helpful! Short, to the point, and very well explained. Thank you! :)
nice one
Becca p
true!
You should have a podcast ! Thank you so much . You have no idea how many students around the world that are blessed because of you .
Thank you so much for explaining this. I spent almost all day trying to figure out the roles of the centrosomes, microtubules, and centromeres were!! It's hard to visualize what books are trying to describe. I am more of a visual learner, so this helped so much!!!
Same 😭
Amazing video thank you :)
If anyone is in the UK studying A-Level Biology you also need to know that animal cells cleve from the outside in, and plant cells cleve from the inside out, laying down platelets of cellulose. It was a question that came up on a paper a few years ago and caught people by supprise!
Just a tip to differentiate between centromere and centrosome
centroMere - middle (MIDDLE of sister chromatids & cell)
centroSome- Side (sides of sister chromatids & cell).
I hope this helps.
7:05 lol Sal says "what's going to happen next" 4 times
The suspense
Lol
He repeats everything quite frequently in order to emphasize the steps. But sometimes, like in the case that Kyle pointed out, he is just stuttering lol
Kyle Tomlinson d
REMIX!!!
Taking a science test tommrow and this really helped me as well as all the other videos khan academy has to offer? I use their videos mostly for my algebra 1. You guys are the best keep it up. (Inspiring nerds like me everywhere)😂
when people they put out this long presentations with so much info in them, they are hard to follow. they are all so worried about sounding academical and the message gets lost. but not with you. you are awesome.
the swallowing makes me want to scream... HOWEVER your videos have helped me ALOT - Thanks a Bunch!
I'm making it magenta... bc it looks nice... Indeed, it does look nice, indeed
This helped me so much . Thank you so much . I finally understand .
These videos make complex concepts so much easier to understand. Thank you so, so much! I can't believe how much I enjoy watching them. I choose them over my lectures any day! This is HEAVEN to the visual learner, which is the best way I learn!
سبحانك اللهم وبحمدك نشهد ان لا اله الا انت نستغفرك ونتوب اليك
Thanks for explaining mitosis. If you don't mind, I would like to ask a few questions for clarification:
1) Two sister chromatids, are they exactly identical, or are they "complement" of each other, A being paired with T, C with G? If sister chromatids are exactly identical, what bond makes them stay together?
2) I watched both Mitosis and Meiosis video. Where does the concept of "double helix" comes into play?
this guy knows how to explain stuff, i have never understood this. Now after just one video I get it
Thank you so much for these helpful videos! I'm a visual learner and I couldn't get through college without TH-cam! Only thing, with this video, you didn't mention the Prometaphase stage, which I need to know for class...there are 5 stages to mitosis, not four. Still a helpful video.
Really depends on the teacher
Much more helpful than just reading the slides my prof provided. Thank you!!
Sal loves magenta!
but does magenta love Sal
I Picked Me A Tasty Cookie
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
i thank god your channel exists
You just saved my life. Thank you
Thank you so much! I have a test in cell biology this week and these videos are so helpful!
Taught me more than my biology teacher did
same🤣🤣
These videos are the reason i am not failing my classes
THANK YOU SO MUCH! I have a test tomorrow and this is a really good study technique.
I just have one small doubt... what happens to all the organelles in the cell when mitosis happens? Do they disintegrate along with the nuclear membrane?
However, your videos are extremely well depicted and a great way to study! Hope you keep up your good work!
They also grow and synthesize like mitochondria in G1 and G2 phases
Besr lecture I have ever seen on mitosis(from Bsngladesh 🇧🇩)
Make it so easy to understand..thnks
truly an artist..
Thank you keep up the awesome work. I feel so much more ready for my big test coming up having watched your videos.
Prophase
Sister chromatids (DNA) go from being in their spread-out chromatin form, to a more condensed form that can be seen from a light microscope, connected at the centromere. Nuclear membrane/envelope starts to go away. Centrosomes migrate to opposite sides of the cell. Mitotic spindle begins to develop
Metaphase
Nuclear membrane is now gone Chromosomes start to line up in the middle of the cell Centrosomes are at opposite ends of the cell Microtubules extend from centrosomes to the other centrosomes and centromeres. This helps steady the tension of the cell, making sure everything stays in the right place. The mitotic spindle is now fully formed and three groups of spindle microtubules should be present.
Next anaphase
DNA separates and migrates to either side of the cell. Microtubules from the centrosome begin to pull on the sister chromatids, separating them into independent chromosomes. The point at which the spindle fibres attach to the sister chromatid is known as the kinetochore. Cellular membrane begins to pinch inward at the centre point, preparing for the cell to split into 2 (cytokenises).
Telophase
Nuclear membranes form around the DNA. DNA goes back to its chromatid form. Cytokinesis occurs
This is sooooo crazy wow god created us perfectly subhana Allah 🤌🏻🤌🏻and thank you , you explained this lesson briefly, in an perfect and enjoyable way 🤍
I think there should be another name for a "chromosome" when it is replicated into two sister chromatids (duosome?). This new entity is essentially two chromosomes lassoed together and yet we still refer to it as "a chromosome", which can be confusing for students when describing mitosis/meiosis.
2:53
What is Newton's First Law?
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. The key point here is that if there is no net force acting on an object (if all the external forces cancel each other out) then the object will maintain a constant velocity. If that velocity is zero, then the object remains at rest. If an external force is applied, the velocity will change because of the force.
So what external force acts upon the cell to do Cytokinesis
do you know what kinesis means in Greek?
It means MOTION
"Scientists are still trying to explain HOW this process works"
Here is the twist, they do know, they just won't accept the truth
keep in mind, no cell has a brain by its self
so how can everything in that cell move without an intelligence behind that?
they can't
not without help from the creator, God himself
hear me out, how many parts of the DNA sequence are there?
FOUR
how many rectangles extend outward from the cross that Jesus died on?
FOUR
just saying
THANK YOU FOR YOUR EXISTENCE
0:16 "My-toe-sis" lol
Oh wonderful teaching
Thank you for saving my life ❤
Best Explanation Ever!
Thank you #mitosis made easy
The best vid for mitosis explained! I really thanks of your vid.
Thank you very much for the video, I struggled to comprehend mitosis from textbooks and lessons but this was very well presented
he makes everything so simple and basicccc good job
A very helpful video wellexplained in a very short time
Thank you so much. Our school has to take standard tests to graduate and this helps so much. Now, off to Meiosis!
Amazing effort...
question . for cytokinesis, except for the centrosomes, do other organelles replicate?
NO
This helps so much! Thanks! Cheers
this is the best video ever, very informative and FUN. saved my life in ap bio and now i love the color magenta. 10/10 would watch again and again. what a good time best teacher EVER!!!!
Omg thank you for making these videos! I have a test on mitosis and meiosis tomorrow and it was super confusing but i totally get it now!
Brilliant explanation sir!!
"You'll see this in the cell - it's unlikely to me magenta!"
just wow. Thank you very much . you explained v well. even you emphasized those things every time where we can confuse like centromere centosome etc . Literally i can say that with the 16 years education i always confused about chromosome form now you cleared the concept about chromatid that this is also called one copy of chromasome . Thank you very much. sometimes we confuse even with very little things but you also clear little things. This is my first time when i heared your lecture and became your fan
Your explanation is just amazing ♥️🙏
Omg this video helped cleared up all of the confusion I had, thank you!
THERE ARE NO WORDS TO APPRECIATE YOUR WORK......👍👍👍👍👍👍✅✅✅✅✅
This video was well explained, and I never got bored. Thank you!
Thankyou Sal!!! you explain things so well for me.
This is video is great , thank you.
Question: Why does DNA have to be compacted?
You're the best teacher!!
Thanks helped understand my lesson in more detail with clear view 👍👍
Using this for addition biology notes... I have GCSE exams soon 😊
Nice explained
That was very helpful. These videos are very well explained. Thank you😊
Thank you so much for going into all the details and explaining it! I really appreciate how much work you put into these videos!
Incredibly helpful👌👍
8:50
Whoever said there was ANYTHING "basic" or "simple" about cell division/cell cycle was either really cocky or had no idea what they were talking about.
I LOVE Khan Academy.
Very good! Continue... Good Luck!
superb video.....gud for bio students
Thank you! The way you explain things makes it really easy to understand:)
This is extremely useful for me
My lord and savior...Sal
thank you so much sal! this really helped me!
Thank you, this was very useful to me.
I finally understand thank you!
great drawings and explanation, also very cool handwriting! thanks for the help.
Thank you so much these videos are amazing!
Awesome, thank u 💞
Wow everyone that’s good in biology is a genius, in my opinion 😂 I envy this guy 😂
Awesome, thanks!! 👏🏻
tnx man
Right now I just need the subtitles in English to practice my pronunciation ^^
ossom!
dude you're amazing i love this!
Thank you very much sir! love your lectures. I'm so grateful for these videos. These help me v.v.much
There is a God.... :0
proof through science :)
Logan Smith how is that obvious??
Yeah right. It's Logical
It is Khan Academy 😊
never expect to find zhongli teaching biology here
gr8 video. just one question. after the telophase, when does the chromosome return to it's scrambled original form or does it at all?
Essentially every aspect of the “how” of mitosis is not understood
I wonder what part of this process evolved first , lol.
Explanation for the simple- evolution.
Is the centrosome meant to be inside the nucleus on the cell to the right at the end?
YES
How does the cell know it has to divide?
3:33
m going to crack this mcaattttt
Does Metaphase comes after Prophase? because in my book it says that Prophase is Prometaphase!
You can use this abbreviation to remember the stages of mitosis: P-MAT. Proprophase is not exactly a definite stage imo, it's more of a transition into prophase. However, PMAT= Prophase, Metaphase, Anaphase and Telophase. Hope that helps :)
This is amazing! Thank you Doc Sal:')
Can we say that karyokinesis starts in prophase??
Thank You