Mitosis | Cells | MCAT | Khan Academy
Вставка
- Опубліковано 3 тра 2015
- Courses on Khan Academy are always 100% free. Start practicing-and saving your progress-now: www.khanacademy.org/science/a...
Mitosis is how cells divide! Learn what happens in all the phases of mitosis: prophase, metaphase, anaphase, and telophase.
Watch the next lesson: www.khanacademy.org/test-prep...
Missed the previous lesson? www.khanacademy.org/test-prep...
MCAT on Khan Academy: Go ahead and practice some passage-based questions!
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to Khan Academy’s MCAT channel: / @khanacademymcatprep
Subscribe to Khan Academy: ua-cam.com/users/subscription_...
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
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 .
These videos are SO incredibly helpful! Short, to the point, and very well explained. Thank you! :)
nice one
Becca p
true!
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!!!
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 😭
Sal loves magenta!
but does magenta love Sal
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)😂
I'm making it magenta... bc it looks nice... Indeed, it does look nice, indeed
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!
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!
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!
Thank you so much! I have a test in cell biology this week and these videos are so helpful!
This helped me so much . Thank you so much . I finally understand .
سبحانك اللهم وبحمدك نشهد ان لا اله الا انت نستغفرك ونتوب اليك
Thank you so much for going into all the details and explaining it! I really appreciate how much work you put into these videos!
0:16 "My-toe-sis" lol
These videos are the reason i am not failing my classes
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
Much more helpful than just reading the slides my prof provided. Thank you!!
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.
This video was well explained, and I never got bored. Thank you!
Thank you keep up the awesome work. I feel so much more ready for my big test coming up having watched your videos.
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!
Omg this video helped cleared up all of the confusion I had, thank you!
i thank god your channel exists
THANK YOU SO MUCH! I have a test tomorrow and this is a really good study technique.
Thank you very much for the video, I struggled to comprehend mitosis from textbooks and lessons but this was very well presented
Thank you so much for these helpful videos! I'm a visual learner and I couldn't get through college without UA-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
Brilliant explanation sir!!
Thankyou Sal!!! you explain things so well for me.
That was very helpful. These videos are very well explained. Thank you😊
This helps so much! Thanks! Cheers
thank you so much sal! this really helped me!
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
Thank you! The way you explain things makes it really easy to understand:)
This is amazing! Thank you Doc Sal:')
The best vid for mitosis explained! I really thanks of your vid.
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!!!!
Thank you so much. Our school has to take standard tests to graduate and this helps so much. Now, off to Meiosis!
You just saved my life. Thank you
Thanks helped understand my lesson in more detail with clear view 👍👍
THANK YOU FOR YOUR EXISTENCE
This is video is great , thank you.
Question: Why does DNA have to be compacted?
Thank you very much sir! love your lectures. I'm so grateful for these videos. These help me v.v.much
he makes everything so simple and basicccc good job
Best Explanation Ever!
Your explanation is just amazing ♥️🙏
Make it so easy to understand..thnks
Thank you for saving my life ❤
truly an artist..
A very helpful video wellexplained in a very short time
Incredibly helpful👌👍
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.
There is a God.... :0
proof through science :)
Logan Smith how is that obvious??
Yeah right. It's Logical
It is Khan Academy 😊
Thank you, this was very useful to me.
Thank you so much these videos are amazing!
Amazing effort...
Thank you #mitosis made easy
This is extremely useful for me
I Picked Me A Tasty Cookie
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
I finally understand thank you!
dude you're amazing i love this!
You're the best teacher!!
Using this for addition biology notes... I have GCSE exams soon 😊
question . for cytokinesis, except for the centrosomes, do other organelles replicate?
NO
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 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
superb video.....gud for bio students
THERE ARE NO WORDS TO APPRECIATE YOUR WORK......👍👍👍👍👍👍✅✅✅✅✅
I love when he says magenta !
great drawings and explanation, also very cool handwriting! thanks for the help.
Very good! Continue... Good Luck!
Taught me more than my biology teacher did
Awesome, thanks!! 👏🏻
Awesome, thank u 💞
Besr lecture I have ever seen on mitosis(from Bsngladesh 🇧🇩)
"You'll see this in the cell - it's unlikely to me magenta!"
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.
Nice explained
I LOVE Khan Academy.
Thanks a mill
Oh wonderful teaching
tnx man
ossom!
life savor
Right now I just need the subtitles in English to practice my pronunciation ^^
gr8 video. just one question. after the telophase, when does the chromosome return to it's scrambled original form or does it at all?
god bless you yo
Thank You
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.
Awesome video
Thankyou!💙
TELL US WHAT THOSE CHEMICAL REACTIONS ARE 3:00
Thanks!
thank you very much
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
Thank you :)