+Brett Brzycki I seriously doubt he uses Wikipedia, in order to explain a subject as good as khan academy does you have to understand a subject profoundly yourself. His videos are so simplified even a 6 year old can understand any subject from advanced physics to biology. He takes abstract formulas / processes in physics, biology, chemistry and explains it so anyone can understand through relating the topics to every-day life things and to the foundation of the topic itself. For example, back in high school I watched his videos on circuits and he explained how every single electron interacted and how it lead to the formula Ohms Law, he even related the electrons in a circuit to water flowing and he used analogies that made it so easy to understand. My teacher just explained the formula abstractly without explaining why the formula is U=I*R. He is an insanely intelligent man, don't discredit his accomplishment by saying he copy pastes Wikipedia.
When science finally makes sense Khan Academy Thank you so much, I never thought I would ever be able to understand this but now i feel ready for my exam.
I learned more in these 18 minutes than I did in my biology class all semester. Mitosis, meiosis test tomorrow and this should definitely help. Thank you!
wow..total "aha moment" for me. after i don't know how many times this was taught to me, it actually makes sense now. its the same information, but the way that you explain it....bravo, good sir, bravo.
You made my night. You are more interesting and informative than my bio professor.. I learned more from you and did not fall asleep. I love bright colorful pictures. Thanks a bunch.
This man over here,knows pretty much everything. Thank you so much for putting all of this widespread variation of videos up, helps me and probably LOTS of others a lot, definitely actually!
all i can say is im very happy u won that race, ive just realized u have THREE THOUSAND FIVE HUNDRED NINETEEN (3519) videos up, thats crazy.. dunno what i would do without khan academy.. just.. just thanks man
My history teacher has a heavy Russian accent AND she's pregnant, and she's one of the best teachers I've ever had. But yeah, this guy is awesome. Far better than my biology teacher.
I've learned more about Biology watching 4 of your videos than I've learned in my biology class in the past month.... Words cannot describe how grateful I am for these videos. Thank you!!! P.S. Your art/writing computer skills kick some legit ass.
Thank you for the time and energy u put into this video. As a first years pharmacy student, been having difficulties getting my head around the idea of meiosis and mitosis even through A'levels. However, watching ur video has been very helpful. Hence, with ur explanation from the video alone without reading any text I can explain the process and differentiate meiosis and mitosis. Thx a million.
this really helps out a lot. When i was in lecture i couldn't understand the professor but after watching your videos I get it now thanks so much keep up the good work.
wow dude thanks so much! i love biology but especially now that you helped me understand the sexual reproduction process more and that mitosis forms you as a human! thanks so much really helpfull video :)
Hello, thanks for your videos helps a lot. It might be a stupid question, but why cant life start with just 23 chromosomes, what is the reason for having diploid number of chromosomes, since each homologous pair have similar genes that can code for a protein. So why cant an egg cell just start to divide?
Witcher47 I am not an expert but from my knowledge some species do and our cells continuously decide our body to replace old ones (think dead skin). We just reproduce needed both.
@jeanpeup There can be a link, but it is complex and difficult to generalize about. There are many genes, and not all are equally important at all times. Life as a sperm cell and life as a human being are quite different. The gene complement that make a sperm swim fast or an egg viable may are not necessarily related to the gene complement that would make you develop normally versus a trisomic complement, or some other pathological/syndrome. In this case genes for sperm speed are selected for.
Sir,it would be very kind of you , if you answer to a question of mine.Are the 4sperms or male gametes formed are in a race of fertile the female gametes or ova
No, you can't. It's always one egg and one sperm. Fraternal twins come about by having the egg split into two, and having two sperms fertilize them (therefore they are not identical). Identical twins arise from one fertilize egg (or zygote) that for some reason splits in half, which then both develop into two identical twins.
One problem I found, the first sperm does not usually fertilise the egg, the first often tires and dies (not quite so inspiring I know). The cumulus oophorus surrounding the egg requires the efforts of many sperm for one to penetrate. So in reality rather than the sprinter we are actually the sperm who finished the marathon and through using others nabbed the ultimate prize.
Your are God's gift to BIO students
COVERUР ЕХРОSЕD: ЕD wаs сurеd 300 уеаrs BЕFОRE Viаgrаааа => twitter.com/69d21b393ddb1d94e/status/804602507225808896 Мitosis Меiоsis and Sехuаl Rеprоооduсtiоn
My textbooks made no sense for some 7 long months and here goes a 20 minute video explaining almost more than what I wanted!! Kudos to you man
Is this guy a genius? He knows every subject there is to know!
no, he just reads books right before doing the lessons.
Bye books you mean Wikipedia, right? @@daivdninjabiomech7888 ?
@@brettbrzycki6845 wikipedia sucks for learning things
@@daivdninjabiomech7888 yeah but he uses it...
He even says it himself in another video
+Brett Brzycki I seriously doubt he uses Wikipedia, in order to explain a subject as good as khan academy does you have to understand a subject profoundly yourself. His videos are so simplified even a 6 year old can understand any subject from advanced physics to biology. He takes abstract formulas / processes in physics, biology, chemistry and explains it so anyone can understand through relating the topics to every-day life things and to the foundation of the topic itself. For example, back in high school I watched his videos on circuits and he explained how every single electron interacted and how it lead to the formula Ohms Law, he even related the electrons in a circuit to water flowing and he used analogies that made it so easy to understand. My teacher just explained the formula abstractly without explaining why the formula is U=I*R. He is an insanely intelligent man, don't discredit his accomplishment by saying he copy pastes Wikipedia.
When science finally makes sense Khan Academy Thank you so much, I never thought I would ever be able to understand this but now i feel ready for my exam.
My mom, a doctor from back home, was amazed at how clearly Sal explained the concepts of mitosis and meiosis. Keep up the good work Sal!
Wow
@@emon3851 wow
@@ChiragSonne wow
I learned more in these 18 minutes than I did in my biology class all semester. Mitosis, meiosis test tomorrow and this should definitely help. Thank you!
8 years later and i’m in the exact same situation 😂 this stuff will never get old, this guys is gonna live forever through these videos
wow..total "aha moment" for me. after i don't know how many times this was taught to me, it actually makes sense now. its the same information, but the way that you explain it....bravo, good sir, bravo.
LOL my high school biology teacher is really bad so I've had to watch Khan Academy to learn the entire course.
It’s okay our school system is only built around money and not teaching people what they need to know. Glad to see another critical thinker
@@nicholasalexander4621 same here!
You made my night. You are more interesting and informative than my bio professor.. I learned more from you and did not fall asleep. I love bright colorful pictures. Thanks a bunch.
I seriously learned more in this 18 minutes then my last 7 weeks in class.. Thank you!!!
thank you very much for teaching more about biology in a few hours than my teacher in 4 months!!!!!!!!!!!
Really appreciate your time and dedication of showcasing your talent in these videos for the use of others. You're a God sent!
Who else thought his drawing of the human being was splendid? Cause I did.
+eliud tejada Me! I was thinking the same and came into the comments to see if anyone else did:)
LOL great minds think alike! Tanya Morales
Really good 😳😳
I haven't had biology in highschool and this is so useful for my intro courses on the university. Thanks alot!
please please dont delete these biology videos! and please make more of them!
14 years wow
Z he still alive 🥺@@karlabingol5314
i learned more from this than from 4 biology lessons, thank you
My teacher is a nice guy, but he can't explain this clearly. I'm glad you're here to help, khanacademy!
This man over here,knows pretty much everything. Thank you so much for putting all of this widespread variation of videos up, helps me and probably LOTS of others a lot, definitely actually!
Great video. Nice positioning of the 'arrow' on the human!
Haha
Thank you for making this amazing video. I learned a lot more this video than what my Bio teacher is teaching me .
all i can say is im very happy u won that race, ive just realized u have THREE THOUSAND FIVE HUNDRED NINETEEN (3519) videos up, thats crazy.. dunno what i would do without khan academy.. just.. just thanks man
My history teacher has a heavy Russian accent AND she's pregnant, and she's one of the best teachers I've ever had.
But yeah, this guy is awesome. Far better than my biology teacher.
thank you, a day before final exam!
I suddenly started to like Biology
Wow keep up the good work Sal!!!
I've learned more about Biology watching 4 of your videos than I've learned in my biology class in the past month.... Words cannot describe how grateful I am for these videos.
Thank you!!!
P.S. Your art/writing computer skills kick some legit ass.
You are AMAZING.
You just might be the reason I barely pass my exam tomorrow.
holy cow, this is inspiring how well u teach
I think this is the only video in youtube which is usefull
Thank you for the time and energy u put into this video. As a first years pharmacy student, been having difficulties getting my head around the idea of meiosis and mitosis even through A'levels. However, watching ur video has been very helpful. Hence, with ur explanation from the video alone without reading any text I can explain the process and differentiate meiosis and mitosis. Thx a million.
Thanks you so much ,my all points are clear today about meiosis and mitosis,,your way of teaching is very nice ❣️
when science finally makes sense! May God bless you!
Wow, that was really helpful. Sometimes I can't understand my teacher but this is a lot more clear. Thank You.
got a 90 on my test because of this video (; recommend this to anyone of my friends who are having trounle with mitosis and meiosis
you are so much easier to follow then my lecturers!
this really helps out a lot. When i was in lecture i couldn't understand the professor but after watching your videos I get it now thanks so much keep up the good work.
Are u alive
Great awesome video,,, i swear no one could explain it like you,,,
Thank you... I am making an A in biology 101 .. your the best.. you make biology interesting
yeah and videos like this teach you about 4 times faster and better than in class!
love this, it helps me get the basics down so as i read my textbook i can understand a lot better.
Sal is a better math teacher than a Science teacher
Thank you for the videos they are very helpful. I finally understood what meiosis and mitosis were
I am definitely gonna bring 💯 on tomorrow's test
Well gifted , god bless
Amazing , finally I got my question answered
Thanks so much! This has helped me prepare for a test.
Glad Khan is here for all of us doing the cramming for the AP Bio test
This helped me so much for my bio exam tomorrow. Thanks a lot!
very useful no need of classes
God blessed you, dear Sal Khan
These videos are so helpful. Thank you so much for making them 😃
dude ur vid really helped me for my biology test. thx a lot
This was an extremely helpful video for my upcoming level 1 exams. Thank-you sir, you are awesome. :)
Thanks a lot for your explanations, all your videos are great ! Keep going on !
I don't understand in school because of the kids but in this video I just understood every everything thank you so much
I want to know how he learned all this...
maestro khan you've done it again
Thankyou so much for the video. Great explanation❤️
wow dude thanks so much! i love biology but especially now that you helped me understand the sexual reproduction process more and that mitosis forms you as a human! thanks so much really helpfull video :)
Can I just say that I love you? I hate biology!! But you make it easy to understand!
thanks so much i been doing good with mitois,meiosis and sexual reproduction thanks to this video thanks you help me alot.
Hello, thanks for your videos helps a lot. It might be a stupid question, but why cant life start with just 23 chromosomes, what is the reason for having diploid number of chromosomes, since each homologous pair have similar genes that can code for a protein. So why cant an egg cell just start to divide?
Witcher47 I am not an expert but from my knowledge some species do and our cells continuously decide our body to replace old ones (think dead skin). We just reproduce needed both.
unless u want ur kids to look exactly like you hahaha
Thanks. Amazing video, Explained so well.
Thank you. It has helped me understand the process of Mitosis.
Wow great explanation, now I understood, thank for sharing :-)
If they are not in a germ cell, how do they end up in the DNA of the offspring?
Cool
wow I actually understand this, I think I'm going to cry.
you Sir are awesome my teacher made it so hard to understand u made it so easy
Your videos are so helpful! Thank you so much!
Hi how's life
Best explanation 👍
why is he talking about society and predators i just wanna finish my homework
8:11 the r r r hahaa this is funny. Anyway thanks a lot!!! It helps
Thank you so much :) i have a test on tuesday and it helped alot :D THANK YOUUUUUUU
People here
80% People that have a test tomorrow
15% People that are doing homework
5% people who are interested
😂😂😂
its easy but my teacher just makes it seem so darn difficult but hopefully this will help me pass my test tommorow. fingers crossed
how’d u go
ofcorse khan u are a true artist
Awesome video.
I don't know why I just watched this whole video but I think I'm going to watch another..
Sperm cells basically does this battle royale for the egg. remember, you were the one who got the victory royale.
These are amazing videos. Thank you.
So then how does meiosis produce gametes? It seems from what you explained that gametes are used for meiosis.
'that's a purple mutation' I ACTUALLY LOVE YOU. THANKYOU.
people say that the internet is harmful andthat it damages young peoples minds. This proves all those people wrong. Thank you.
Wow excellent explanation
recommend this to any of my friends who are having TROUBLE mispel
why your illustration is so much clearer than those fancy ones in textbook
Why isn't this video on the official Khan Academy page anymore?
wheres the battlefield videos im lost
@jeanpeup There can be a link, but it is complex and difficult to generalize about. There are many genes, and not all are equally important at all times. Life as a sperm cell and life as a human being are quite different. The gene complement that make a sperm swim fast or an egg viable may are not necessarily related to the gene complement that would make you develop normally versus a trisomic complement, or some other pathological/syndrome.
In this case genes for sperm speed are selected for.
Sir,it would be very kind of you , if you answer to a question of mine.Are the 4sperms or male gametes formed are in a race of fertile the female gametes or ova
No, you can't.
It's always one egg and one sperm. Fraternal twins come about by having the egg split into two, and having two sperms fertilize them (therefore they are not identical).
Identical twins arise from one fertilize egg (or zygote) that for some reason splits in half, which then both develop into two identical twins.
the fact that your human diagram lines did not touch drove me insane good video though :D
One problem I found, the first sperm does not usually fertilise the egg, the first often tires and dies (not quite so inspiring I know). The cumulus oophorus surrounding the egg requires the efforts of many sperm for one to penetrate. So in reality rather than the sprinter we are actually the sperm who finished the marathon and through using others nabbed the ultimate prize.
Love it! So helpful!
OMG thank you soo much for this video!! I wish you could come to WVU and teach my biology class!
thanks sal! ur are my saviour!
I love you! I wish you were my biology teacher! WOW!
Thank you so much. Even though I attend a top notch school where tuition is over 41K a year, most of my professors are horrible at explaining.
Excellent for teaching! thanks to you!
EVERYTHING MAKES SENSE NOW
fantastic representation of these processes btw :)
SO FRIKIN HELPFUL. IM GONNA ACE THIS EXAM.