Meiosis: Where the Sex Starts - Crash Course Biology #13
Vložit
- čas přidán 18. 06. 2024
- Hank gets down to the nitty-gritty about meiosis, the special type of cell division that is necessary for sexual reproduction in eukaryotic organisms.
References:
faculty.clintoncc.suny.edu/fac...
www.genome.gov/Glossary/index...
www.sumanasinc.com/webcontent/...
sun.menloschool.org/~dspence/b...
Table of Contents
1) Homologous Chromosome Pairs 2:10
2) Primary Oocytes 3:30
3) Primary Spermatocytes 3:30
4) Meiosis 2:59
5) Interphase I 4:04
6) Prophase I 4:37
a) Crossover 5:05
b) Recombination 5:05
7) Metaphase I 7:53
8) Anaphase I 8:05
9) Telophase I 8:19
10) Prophase II 8:57
11) Metaphase II 9:23
12) Anaphase II 9:28
13) Telophase II 9:32
Crash Course is on Patreon! You can support us directly by signing up at / crashcourse
Want to find Crash Course elsewhere on the internet?
Facebook - / youtubecrashcourse
Twitter - / thecrashcourse
Instagram - / thecrashcourse
CC Kids: / crashcoursekids
I find it funny that instead of having a picture of john, they just filmed him standing there, silently, not moving for like a good 30 seconds.
Ya your right lol
+Nissa Smith I WAS DYING WHEN I SAW THAT LOLOLOL
+Nissa Smith He didn't even blink!
+Nissa Smith i died when he said "I'm way better in assasins creet than him" xDDD
Moueies
i like how he brings his brother on just to roast him on his genetic traits .
Good luck to everyone who has finals this week. *cries quietly into textbook at **2:35**am*
EOC tomorrow kms
+Dizzy Lizzie I have my Biology Final tomorrow morning :( I hope you did well!
Ashton Bailey rip you
Bio keystones tomorrow
TheCrazyNintendoMan ! mario galaxy
Anyone else was expecting John to be all like "Hey!"
+DrunkOnAnime yep i was so disappointed he didn't argue back or something
IKR!
Yup.
QueenJoou This one is Hank not John.
Alex Shi John is in the beginning lol..they filmed him for like 30 seconds just still
110% relying on your mitosis and meiosis vids to pass bio.
Juzzy K big facts
For those who say these videos helped them pass a grade. I mean sure, thanks to the videos you guys passed and we are very grateful for his videos, BUT give some credit to yourself. Even if you did not get that passing grade, you did something fewer and fewer people do nowadays: trying your best and taking the initiative. YOU took the time and effort to watch the videos and CHOOSE to learn! That kind of determination and diligence is admirable and very commendable! :D
You've taught me so much more than my teacher ever has. Thank you so much for saving my grades.
Sameee
Vanessa Isaac
( ͡° ͜ʖ ͡°)
gotta love horribly underfunded yet mandatory education systems lololollolo
I HAVE AN EXAM IN 30 MINUTES AND IM CRAMMING ALL THIS INFORMATION INTO MY BRAIN BECAUSE I DIDNT LEARN ANYTHING FROM MY TEACHER WISH ME LUCK!!!!!!!!!!!!!!!!!
how'd you do?
how did it go?
U good?
I'm guessing it didn't go too well lmao
How'd u do?
WE NEED TEACHERS LIKE YOU IN SCHOOLS!!!
Ms Kate be careful what you wish for for all you know he might make us make a project on it, your partner has to watch the video with you, partner has to be opposite gender, has to bring model home and show you parents how it happened (0_0)
The only reason i'll pass biology is because of these videos
Preach
Lucy Olivia these are making up a chunk of my AS revision thank you so much Hank
OMG! These videos are really good, I used to be suck at science, but these videos are a godsend.
Comment if you agree.
Lucy Olivia same
Lucy Olivia same
You are saving my career as a biologist.
I'm a BIO teacher, and I review these because they are so much faster than going back to the text.
Cramming for a test tomorrow! This is so helpful! Teachers take two days to finish what he did in like 10-11 min
I'm also cramming in a study session for tomorrow's test
This video helped me so much!! study sessions help too,but i missed mine
Sanjana Jothimurugan I'm doing this 20 minutes before my biology exam
Sanjana Jothimurugan i bet you failed
nah G they take like a week at my shitty public school
Such Crash Course.
Much Science.
Very Biology.
So Green Brothers.
Wow.
much doge
Amaze
Bamboozle
Such 2014
imagine how hard it was for john to just stand still and have to listen to hank
who else got an exam tomorrow? lol
missunknownps3 meeeee!!! biology to be exact, about mitosis and meiosis to be exact
yes bio lab final :(((((
love that profile picture missunknownps3
missunknownps3 I have biology exam tomorrow.
It's midnight and I have an entire semester exam tomorrow hah
I’ve watched this so many times that it’s finally starting to make sense
if you were my teacher I'd be getting an A ++++++++++++++++ in biology
tru!
***** ikr..... i wish
Vc
Hoainam Le gmfdv
***** seriously doubt you would get an "A ++++++++++++++++" since that is an absurd grading scale that a normal instructor wouldn't use. smh
I would have failed history and biology in college if it weren't for you guys! Thank youu so much! these videos are awesome and perfect for procrastinators like myself!
I dare you to watch from 0:33-0:42 at half speed and not think about how Hank sounds drunk
Dude, you are a legend
I just did this...and THIS is how I imagine him at a party, wasted, trying to science... LOL
I died laughing lol!
LMAO! Thank you!
especially when he sais ughhhh duuuuuuude
I come back to this video every few years when I find myself needing a reminder about this process. Thanks Hank
learned more in 11 minutes than what my bio teacher could do in 6 weeks
I wasn't aware that my epic assassins creed skill came from genetics
Samuel Sargunam Completely unrelated but... Clannad =
Julian Lopez Clannad is amazing!
Samuel Sargunam Well apparently it does now.
Samuel Sargunam He could be genetically predisposed to video games, which allows him to get better at video games faster.
Clannad Afterstory💕
"I'm better at Assassin's Creed than he is..."
Oh Hank, please. never change.
i'm doing a summer semester online with no classroom interaction, just READ THIS CHAPTER AND LEARN IT.
thank you, hank, for teaching me biology.
You explain this much better and much more comprehensible than my teacher. And English isn't even my mother language...
same hier
Can you do Punnet Squares and Proababiltiy of Genetics/heredity?!?
+Laken Gross they did it, in a video about DNA
Punnet squares aren't that difficult to understand...
Watch their heredity video, they talked about it really distinctively
lmfao. i wish this guy was my teacher. he's so funny
My Bio teacher would beg to differ
Comment and like if you think Crash Course should do Physics
Totally #Trump2016
+Tyler Goodchild (tg228) Crash Course Physics is now available!
Contagion Dwayne Johnson?
Yess
Yes
6:50 John doing a mannequin challenge 4 years before it was a thing!!😂😂😂😂😂
@@ZeeGhost713 WTFFFFFFF
do we love how john didn't blink at all during that 15 seconds.
I feel the weirdest deja vu watching this again for my upper division molecular genetics class. Feels like I'm in 10th grade AP biology again. 😅
This entire channel is an amazing addition to text books and lectures! Amazing detailed overviews that really help organize everything in my brain-space. Much love and thanks for these videos!
this will come in handy for my bio exam thanks,Hank
he makes biology sound good
Note to students: don’t cram 30 minutes before an exam! Not that I’m speaking from personal experience or anything....
This is probably the most useful channel on youtube, thank you so much
Why is this guy getting 122 dislikes... ._. ?
Hes helping us and its explains it well. Why dislike?
Wow, in all my biology education through high school I was never informed that only one of the daughter cells of meiosis becomes an actual egg cell. Thanks for that tidbit, good sir!
bro coming back to this channel after a long time is amazing because its somehow even funnier than 12 year old me remembers it being
great stuff
THANK YOU THANK YOU THANK YOU!!!! I`m almost crying tears of joy, because something I used to watch just for fun now is very useful for studies AND FUN. Sending all my love to the people of Crash Course
So when I eat popcorn, I'm basically swallowing plant sperm?
idunnowhatimdoin Thanks for ruining the movies for me...
idunnowhatimdoin if you're allergic to pollen then you're allergic to plant sperm
It is plant sperm!!!!!!
idunnowhatimdoin that's deep bro
when you have a bio final tmrw and your internet connection is being a shthead frkng hate this. arghhhh
cringe
oOf
Can i just give you some appreciation for actually making me enjoy AND understand science. You have been saving my academic career for 7 months now.
Sir you have saved me this semester in my Biology course. Thanks so much for entertaining and understandable videos.
I have "finals" in biology on monday! So damned stressed out!
Thank you crash course! can you do a series on math next? :D
atheistfromnorway AP Bio?
Kreeky ?
atheistfromnorway Just wondering if you were also in ap bio because that's when our ap test is.
well I doubt it, never heard of AP bio. I have "biology 1". What does AP mean?
atheistfromnorway Don't I look foolish. It's advanced placement: essentially, a high school course that teaches at a college level. If you pass the exam at the end of the year, you get college cred.
Hank you do the best "Aww Dude" on this planet!! 00:41
LOVE the way this guy explain the process, Great Job Bud!
My biology teacher showed our class this channel my sophomore year of high school. Now im a freshman in college and i still watch this. It's so easy to learn from this!
Thank God CrashCourse biology exist or i might fail my class. Honestly, all the visuals are awesome and its just way more interesting than a boring slide show and taking notes.
I'm so impressed with these crash course videos! I find them incredibly useful for bio english and history. S/O to whoever is funding these and making them publicly available
I have learned more and come to a better understanding of biology watching 5 episodes of crash course in comparison to 12 hours of school which had only left me clueless.
Hank Green, you are seriously a student's lifesaver.
Thank you.
bless your soul, I was falling asleep watching a bunch of drawings on a black screen, you make this a lot more easier to pay attention to
The fact that he brings up Doctor Who in almost every video makes my day
This is how im getting through the AP Bio exam lol
Влад Кузь SAAAAMMMMEEEEE
Влад Кузь SAME
Влад Кузь AP? This is my normal year 12 exam!
Oscar Megan yeah, AP means advanced placement, meaning you can take this as a 9th grader
AP Bio as a 9th grader? My AP Bio teacher told me that she had one freshman take it but he dropped out after a month. Its just not something that your average 8th grade science class can prepare you for.
I have never been able to get over how amazing meiosis is. Great Video!
I have a quiz on this tomorrow. Thank you for making it clear!!!
Going on 30+ hours of studying for SAT bio and mitosis/meiosis still always get me
the animations are very cute btw
Damn it, even with CrashCourse I don't get this stuff. I'm in college studying psychology now, and thought I would look this stuff back up as I never got it completely in high school even though I really liked biology, but yeah... Everything is so mixed up and complicated when it comes to DNA replication/meiosis/mitosis, I just keep missing stuff and getting confused.
Get out some flash cards, when ever he says something you don't know or understand, make a flash card for it and look up the definition. There is a lot of stuff, and it requires lots of reading, watching videos, and studying to get it down.
Thanks man, I'll give it a go
You could always try any exercises online
Go to MasteringBiology for practive quizzes, activities, videos ...... I'm studying psychology too and it helps ;)
It's really fast paced, but I found that taking out a notepad and writing notes, pausing the video, as he says the important info makes the whole video make a whole lot of sense!
Then you just watch the video again and you understand everything he says.
cool videos . john is humorous in his way of expressing , making my interest in biology more.
Thank you for always having CC!
You have finally inspired me after an entire semester of biology to be wowed by the processes inside of our body and cells. Thank you for bringing humour and logic to this complicated topic. Lets hope the exam goes well tomorrow ;)
Lol. Omg, you're Hank green? This legit just made my day and I was all like, "Did he say John? Wait, is that John Green?" OMGGGGGGGGGG. John Green is my favorite author
+Sena Donkor Yeah haha, I also didn't know that (until some days ago)
This helped me out so much, i can't thank you enough for these videos
you made it pretty easy nd interesting .. like im planning to watch all ur videos in the summer holiday !
You should make a physics page
Omg L :D...and yes I agree a physics page should be made.
***** thermodynamics is a part of physics.. are you high
Quantum mechanics is physics -_-
What are these comments XD
i don teven remmber writing this -_-
It's really confusing when he says "there's your mother's version lined up right next to your father's version" when the entire process is happening in a single person, it almost sounds like it's happening in an embryo, and it's not.
You have 23 pairs of cromosomes, half of those pairs are from your dad, the other from your mom
Yeah, I was confused about that at first too
Ikr
Dude I know this was 3 years ago but can you explain this? I cannot wrap my head around what he's saying - it doesn't add up logically
I'm still watching this in 2017! Thanks for the great work!
Thank you crash course!
You guys know how to make it fun and interesting
I'm studying this stuff for my next test
I learn perfectly fine in class, I just like going over things once more with a different view/explanation. I love watching Crash Course videos about stuff I already know
You, sir, have been instrumental in my understanding of biology. I would simply like to thank you!
Thank you soo much your videos really helped me so much Everyone who wants to learn i tell them to watch you hands down the best learning channel on the internet :D
I'm a physicist who recently began work in the field of Bio-Medical Engineering. These videos have helped me SO MUCH. I cannot thank you enough.
You're better at Assassin's Creed? You mean you can press the X button faster than him during the cut scene? lol
Really, how is it even possible to be bad at Assassin's Creed?
Peter P-a-n Mashing the attack button and never blocking, not running into hiding places. NOT COLLECTING EVERYTHING!
Thanks for the lovely introduction , went of full volume in library
thank you so much. I needed this more than id like to admit
Wait, this guy isn't John Green? I THOUGHT HE WAS JOHN FOR THE LONGEST TIME.
This is his younger brother, Hank Green! XD
dude, same here, i just found out a few weeks ago, when in one video i saw both of them...
Lol
keep up
ha ha ha
These videos are so great. Hank's always funny and he makes the topic interesting. This really helps with exams. Thanks Crash Course!
You legit get me through year 12 biology
I teach chemistry/biology/physics in Norway. The book the school use can be pretty bad at explaining things like miosis in a good way.
Their English skills are not good enough to understand this type of scholar English.
So to make class more interesting and what they are learning easier to understand I use crash courses where I do a Norwegian voice over in class.
They love it, and they really get it!
Thank you so much for making awesome videos!
You are saving an IB student right now
this was a perfect review for my quiz tomorrow, thank you!
hey you have the same name as me and i also have a quiz over this tomorrow, and im also in the phandom
are you me did i just meet my clone
maggie r i've always wanted a secret clone nice 😂
this video is like 6 years old but oh my god bless you guys LIFE SAVERS
You are a wonderful lecturer!!!! Fantastic! Many thanks and please keep producing high quality videos like this❤️
V beautiful can you watch me in my channel 😊😊😊😊
"My mad Assassin's Creed skills"
That's a learned trait
Bruh, its a joke.
HOLY TARDIS ON GALLIFREY! OKAY, OKAY, YOU FRIKEN MENTIONED DOCTOR WHO AND I OFFICIALLY LOVE YOU FOR ALL OF YOUR REGENERATIONS! :D
***** Sigh...
creepy fangirl
You a creepy nigga!
I'm sorry you don't understand my happiness. Doctor Who brings me so much joy, sadness, and a new appreciation for everyday life. I apologize for your lack of knowledge about Doctor Who.
Actually i watch doctor who, and for your information, im the same as you.
Ahh, you are so helpful! I go to my lecture and I leave, after having just been told all this, knowing I'm going straight home to watch you! Thank you :)
bless your soul hank green you are helping me survive my degree. thank you, truly
Shout out to the Assassin's Creed reference hahahah
+Alyssa Vu Nothing is True
Everything is permitted
Requiescat en pace
+Alyssa Vu shout out to them getting me through genetics
That wasn't a reference lol
of all the mitosis/meiosis videos on youtube, these are the only ones that keep my attention and make it so easy for me to understand. great job
I really love your videos, Its helped me so much in class and now I have an A! Thanks!!
This helped so much for my honors biology class. Thanks!
Without CrsshCourse, I would probably have a C in my Bio H class >__
"trash Brown puff" 😂 😂 😂 😂
Right
Thanks, Crash Course! You guys helped me understand Meiosis, a little better!
Thank you for all that you guys do!
Science _is_ a miracle! Nature and science are the most amazing miracles of all because they are happening all the time and not just once or twice, that's what's so amazing about the world :)
I've re-watched this like 3 times and every time he starts the video with "REPRODUCTION" I'm still surprised and then I have to explain to my family what I'm watching
Can you check me too i an biologist
Dude is fricking awesome!!!! I use these videos in my classes and the students all love them :) very funny and passionate :)
6:04 I love the way he says that, the inflection of his voice.