The Evolution of Lactose Tolerance - HHMI BioInteractive Video
ฝัง
- เผยแพร่เมื่อ 25 ส.ค. 2014
- All adult mammals but humans are lactose intolerant. Follow human geneticist Spencer Wells, director of the Genographic Project of the National Geographic Society, as he tracks down the genetic and societal changes associated with the ability to digest lactose as adults-or lactose tolerance.
Explore how evolutionary biology and cultural changes led to the evolution of lactose tolerance in this educational video.
Free teaching resources supporting this short film can be found at www.hhmi.org/biointeractive/ma... - วิทยาศาสตร์และเทคโนโลยี
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so all the bio classes watching this huh?
Guess so lol
anthropology lol
Here I am
yes sadly
LOL yea
Who's here from your virtual bio class?
correction: who *isn't* here from your virtual bio class
Hey, you in your biology class.... stop scrolling through the comments and watch the video
No way...
smh I'm here for anthropology
i feel attacked
@@RiceeHD Me too. :/
For my fellow students:
1. C
2. A
3. C
4. B
5. B
I wonder how the cats back feels carrying the whole video 😔🤚
This made me laugh way to hard out loud in class
Damn is every bio class watching this?
Mia Andrea yup😂
must be lmao i'm in covid online bio watching this
yes
even in other countries lol, I'm watching for my bio class in Mexico
seems like it xD
2:33
Cat: wtf bro :(
;(
The fact that I’ve had to watch this for 2 separate bio classes
The video was a fascinating watch, especially the part where it showed that lactase persistence evolved differently across various populations. It's incredible to think that something as simple as drinking milk could lead to a genetic adaptation. The explanation of the genetic research was clear and accessible, making the science behind lactase persistence really come alive. It's also quite intriguing to see how cultural practices like dairy farming have shaped our genetic makeup, highlighting the close relationship between our environment and biological evolution.
Another standout moment was learning about the archeological evidence that linked the use of dairy in ancient pottery. The idea that we can trace back the origins of milk consumption through residues in old pots is just mind-blowing. It makes you appreciate the detective work scientists do to piece together our history. This video really underscored the notion that human evolution is as much about our cultural developments as it is about our biology. The gene-culture co-evolution concept is a reminder of how our advancements and adaptations are deeply intertwined.
The world needs more people who are passionate about obtaining knowledge about these things. Intellectual rock stars :)
Cells be like
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Omg i never saw it like that before
o o
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oo oo
I read some comments about their bio classes, lmao I came here because i'm lactose intolerant and i want to know more behind it.. ❤😂
What a great video! Thank you!. This makes studying for finals much more interactive and productive.
ok
who got the answers to the quiz guys
Pov:your supposed to be watching the video for bio but your looking at the comments
I'm so happy I have this mutation. Cause eating ice cream, desserts with cream, sweets with no consequence of bowl problems is awesome
This was Awesome
that cat is the bomb
S/O to all my Fresno State peeps watching this for Bio 10 😤
yessss
ayoooo
Amazing video! I suspected that populations may be able to evolve the same trait through different variations of genetic mutation, but this example in lactase persistence shows that it is possible!
Came here for class but that was very, very interesting. Thoroughly enjoyed.
Glad to hear it!
Well done and well directed video. Thank you!
I think some fruits, berries and seeds “want” to be eaten to aid in their dispersal and germination.
Loved the information and great story telling at the same time.
If your in science class right now you might want to stop looking at the comments and get to work! C: Oh hi class mates of 2022!
im class of 2022 to my dude what school and ok i will
2023 smhh
@@yeedith_510 freshmannnnnnnn
AYYYE! Class of 2022! How y'all doing with alls that's going one?
Class 2024 actually but hi
“If evolution is real, show us an example in modern day of evolutionary divergence in humans!”
I love that there’s an easy answer in “lactose persistence.” Milk for the win.
It scares me that some day i may not be able to eat ice cream >.
I'm craving milk all of a sudden
ok
@Fordfan07 oh fk
'It's the only "food" made with the intention of being consummed.'
Couldn't have better said it, wd
This is so weird. I though there'd be more people who are lactose tolerant than intolerant. Which makes me the 1/3. Additionally I'm Asian and Asians are the race that are most lactose intolerant. About 90% Asian adults are lactose intolerant, which makes me the 10% who are not. I am so blessed I'm lactose tolerant because I LOVE dairy products.
I find it odd how rate lactose tolerance is in Asia. Central asian nomads, like the people of Mongolia, consume tons of dairy, as do South Asians, especially Indian people. I wonder if these are newer cultural practices, and that's why lactose tolerance hasn't become pore common?
Lactose tolerance in India is ~50%, more than in Southern Europe.
ok
Ikr I don't know one person who's lactose intolerant and I knew a lot of people have it but 2/3?!
AYE same!
Im watching this for my 9th grade bio class
Imagine still being in 9th grade..
Awesome! I'm lactose intolerate. It sucks :( dairy products are my favourite products!
Then switch to plant based milk , like ones made from soy , almond, coconut , hemp , rice etc.., some of them do actually taste lighter and better than cow milk and don't cause the bloating and stuff 😎
Relatable
This was really interesting, thanks
The symptoms are terrible nausea, extreme stomach cramps, diarrhea, extreme gas benadryl helps the diarrhea and cramps
i'm lactose intolerant now at age 20, it goes right through me
Fantastic!
what type of natural selection would this be? Example: stabilizing, disruptive, directional?
I think I have lactase persistence, never had diarrhea from drinking fresh milk in large quantities.
I love it. I'm lactose persistence!
That was awesome. learned so much.
Glad it was helpful!
Shut the hell up we all hate bio it’s alr
On my strong paternal side of my D'Auria family on my long lineage, I have: Lactose-Intolerance as I only drink soy milk and almond milk---Not cow's milk and other dairy products. Remainder that I am the Second-Generation Italian-American as the Sephardic Jewish in a fact.
I was lactose persistent until 57. I have some Ashkanazi genes.... I wonder if this means I have another mutation....
I watched this video in class but I decided to talk so I did not pay attention to any of it and I’m regretting it now because I have to rewatch the whole thing 😑
yall here for anthro too?
Bio
yup evolution and human diversity lol
im only here bc of class
5:27 Mr Terwilliger, there's a problem down to the ce-ment mixer!
Hmm, I must be lactose intolerant, I can drink about a half cup per meal but even then that gives me gas, lol. Anything more than that makes me feel sick and passes right through me pretty quickly. Quickly drinking a liter? Forget it.
shout out to my bro evolution for allowing me to drink milk in my tea
Curious to know what the allelic frequencies are in the world's largest producers and consumers of milk: folks in the indian sub-continent, where dairy trumps the consumption of the cow.
i know cats really loves milk. my cat already died but during her adulthood i still give her a small amount of sterilized milk sometimes. i am aware that adult cat actually doesn't need milk so i see to it that she only get milk few times.
I'm lactose intolerant as I recently discovered with a test .All my life I was avoiding milk and yogurt because I could see how my body reacted when I consumed dairy products. I don't have the mutation after all.
Same here.. After leaving milk I can observe me
You can have lactase infused dairy.
And lactase tablets are easily available too.
Subscribed. 👍
'(Genetic) mutation' is basically the one which takes place rarely, hence mutation population is inherently small Unless something in favor of owners happened in their surroundings, right? Why held in some, not becomjng dominant or eliminated, may require answering.
This is very intriguing subject. The argument 'coincidence' in timing in this video demands more scrutiny. Changes in gene & social behavior should not necessarily occur at the same time as speculated here. More to be investigated & studied.
Damn man’s really downed that whole glass of milk and went on with his day.
that's what I thought
this is for my drug and nutrition class....
12:52 Well it's not quite the only food produced to be consumed, right? Isn't honey meant exclusively for consumption?
I’m Mexican but somehow I’m lactase persistent… the Americas didn’t have dairy until the Spanish brought cows… so how fast does lactase persistence develop in a populace?
4:30 wow just forget about half the world ok i see how it is
When you so embarrassed about the entire America's that you don't even include them as being on the same planet.
spped it up at 1.25
Can someone give a 2 paragraph summary
When I was in Hong Kong, I drank milk on my daily basis and everything was fine. I am now in Canada, I release gas more often after I drink milk. Weird :/
Mad fujoshi The milk you drank could have been lactose free milk which even lactose intolerant people can easily drink
milk sourced in Canada may not be from the same source as those in Hong Kong. The cows are genetically different and produce milk that differs in protein:fat content. Also lactase persistence is both genetically and phenotypically more complicated than we currently think,
Have an question: how lactose tolerance is an example of natural selection in humans?
You should definitely watch the video, because your question is explained within it.
not if there is lacto free milk lol
@@beaulieuc8910 lactose free milk wasn't in food stores 2000 years ago 😭
Not "all" but almost all. Some are born without it and for most of human history, they died.
1. C
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ngl I'm really jealous of people who can digest it >:( and my ancestry is Northern Europe the heck
Shout out USU Bio 1010 🤘🏼
So cool how they got Will Ferrell to do this for us.
What about casein intolerance?
hello fellow students in bio
AP Seminar, anyone?
4:15 the rest of the world: baby, i'm not even here
Bruh that cat wants the milk so bad
Me over here watching this video for anthropology and farting and having stomach pains after drinking some milk tea.
2:32 That poor cat
Great video! I see in India, only the west side has high levels of Lactase persistence. I wonder if the sacredness of the cow is only in the west, or if it is in the rest of India too.
Gregorio Grasselli I'm not sure about numbers of individuals sampled for this conclusion most Indians are lactase persistent which is odd considering people of West, Central , south east or east Asian are not lactase persistent.
It's in whole India except in parts of North East which is mostly tribal or Christian and some parts of south where in parts Muslim/Christians are majority.
@@rahulshaman92no.. I am hindu.. And i am. Lactose intolerant.. Lactose tolerance persists only in upper caste people
@@rahulshaman92other should not drink milk
@@kumarmanjeet6704 That’s why God invented lactase enzyme 🥛❣️
Wow 😯
Watching this as I eat yogurt and drink a smoothie
I'm one of the most lactose tolerant people that I know. I can literally drink a full litre of milk at once without experiencing problems afterwards. Except getting fat, of course. ;p
ur a full litre of milk ;p
You must’ve come from a culture that domesticated cattle thousands of years ago. I’m from Italian ancestry which has been drinking milk and making cheese for I don’t know how many generations.
Same! I love that as an adult I can eat and drink dairy. Ice cream is literally my fav thing! And according to ancestry I am like 99% Northern European.
Why she blinking so much at 6:28
poor cat just wants some undetectable sugars 😿😿2:38
Gillibert AP BIO 2021-2022, anyone??
12:55 You forgot about honey lol.
this is why i love milk, and i cant stop drinking the whole milk
shout out anthropology students
For my opinion and since we all start our lives with drinking the milk off the breast of our mothers - lactose intolerance can also be something of wether you actually ARE genetically lactose intolerant or not. Since there are people being genetically "tolerant" but actually are intolerant it must also have to do - concerning the practice - with wether you keep drinking/eating milk-based products in your entire life or not.For whichever (religious/cultural/health) reasons. There is a point: If your body is no longer in need to produce lactase enzyma at all, you will lose it.
not me being lactose intoleraant eating ice cream while watching this video. i want to throw up rn💀💀
😔✊. bio 106 class where u at
Eso de ver que los gatos adultos son intorelantes a la lactosa me ha roto la infancia. Muchas gracias por arruinar infancias
Hi classmates!
What's up my bois on Mrs.Westons Bio :)
I’m going to show this to my anti-evolution friend. Let’s see if he can deny evolution happened, when I show him evidence of it. Thank you so much for this video.
Well, this isn't evolution on the scale that would impress your friend most likely. Technically, the gene for lactase production already exists in all humans, it's just a matter of if the gene expression stays on or not. That kind of thing can happen with lots of stuff, such as how certain animal fur changes color based on temperature, and that's not the body developing something new that didn't already exist. Good luck.
@@someguyusa
I partly agree with you, but evolution is defined as change in the heritable characteristics, passed on to future generations. So this does count as an evolutionary change, but not the strawman version that he will likely be looking for.
Watching this for biology class 🥴
i hate being lactose intolerant lol i want to enjoy my seasonal pumpkin cheesecake ben and jerry's in peace
who cares lol im gonna eat some while watching this
Shout out to vargas ✊🏼
👊
Anyone in anthropology right now? lol
I'm the only one who thinks that dude at 0:55 lookin like a younger Chris Hansen
Hello fellow bio students
where's the Americas in that map? are the Brits salty after 250+ years?
are we all doing bio homework rn?
It was the Vikings they went all around or flat the world and spread the lactose gene.
I don’t know about that whole glucose test… just eat a bunch of ice cream drink a tall glass of milk… if your stomach is fine and you don’t need to go to the bathroom then you’re probably fine with dairy.
I know it's not that serious or relevant in this context, but I hate it when people say Tanzania as Tan (like sun tan ) zania instead of Tan (pronounced Tahn) zania, that's not how you say it.
Kind of like how when people pronounce Germany, "jer-min-ee" instead of "doisch-lond"?