This episode is supported by the Great Courses Plus. Go to TheGreatCoursesPlus.com/Deep to learn
more. These fruit flies are throwing down. They’re like fruit fly gladiators. They lunge. Flip each other over. Roll around. And even toss each other, sumo-wrestler style. Normally, fruit flies don’t get this worked
up over a drop of apple juice. But these guys have had their genes manipulated,
something scientists have been doing to fruit flies for more than a century. Yep, these little insects that we only notice
when they get into our kitchen are unsung heroes of science. In 1910, biologist Thomas Hunt Morgan noticed
a rare white-eyed fly among his normal red-eyed ones. The discovery led to our fundamental understanding
of how genes get passed on from generation to generation. Since then, fruit flies have been key to figuring
out how human diseases work. That’s because, when it comes down to it,
fruit flies are more like us than you might think. They have about the same number of genes: 20,000 or so. In fact, 75 percent of the genes that make
humans sick are found, in a very similar form, in fruit flies. They’re a simpler version of us, a kind
of genetic mirror that scientists have used to learn about cancer, Parkinson’s, Alzheimer’s. And the fighter fruit flies? They’re helping researchers learn about
conditions that tap into our emotional states, like depression or addiction. Neuroscientist Eric Hoopfer – who studies
fruit flies in David Anderson’s lab at Caltech – flashes them with a red light. He has altered these research flies to be
sensitive to this light. It activates a cluster of neurons in the flies’
brains. And they fight. But change the intensity of the light, and
they do something very different. See how they’re vibrating just one wing? That’s fruit fly flirting. The researchers were surprised to see that
the same neurons controlled such different behaviors. What do fighting and “flirting” have in
common? In both, flies are pretty hot and bothered. These neurons control something like emotional
arousal. Pinpointing these circuits in their brain
could help us figure out where trouble starts in the human brain… and maybe one day, lead
to better treatments for mental illness. So the next time you see one of these guys
on your leftover piece of banana, you might want to think twice about swatting it. A little thanks might be in order instead. Thanks to the Great Courses Plus for sponsoring
this episode. The Great Courses Plus is a digital learning service providing a range of topics from educators. Start your one-month trial by clicking the
link below or going to TheGreatCoursesPlus.com/Deep. Hey guys. It’s Lauren. These flies seem to be having fun. If you’re curious about the amorous habits
of other animals, check out our video on newts. Every year they travel back to the pond where
they were born to get some underwater lovin’. And watch how garden snail babies are made. It involves a tiny spear called a “love
dart.” Thanks for watching.
Cool! They made Drosophila melee-nogaster
Fruit fly: on back hoomun halp meh pls
0:23 Y E E T
The power of Red Kryptonite
are you not entertained
You did not just compare me to a fruit fly…
“what do fighting and fu-flirting have in common?”
2:50 this is what pure witchcraft looks like
Sooo cool!
Still gonna swat'em though…
Relationships be like:
All of these videos are ambiguous, vague, poorly informed loads of garbage. Good job pbs.
Wwflies
I’ll say thanks and then kill it heh…3:38
Woah!!! They are legitimately wrestling.
Thanks fruit flies, thanks for helping to find me anxiety meds that actually work 😀
these flys say what sup what sup and Square each other up
🤣🤣🤣🤣🤣🤣🤣
This is the best wrestling fight ever😂😂😂😂😂
They should make a fruit fly WWE
I'm half a furit fly? Then why i don't have wings?
S U M O F L I E S
imagine a fruitfly and john cena wrestling each other.
Oh no I regret watching this. Now when I'm in a house with fruit flies I'm gonna have panic attacks thinking about them "doing it" all around me and possibly me accidentally squishing some in the middle of it and then I have their body parts and goup stuck on me 😷😷😷🤢🤢🤢🤮🤒
Me as a scientist: lol i wonder what would happen if i- oops
makes danger flys
👍❤
a little thanks for making my food NASTY 😒
I showed a fruit fly this video and it started waving a right wing at me..
No…. I’ll still swat it
Cool, now I know that we are identical to these annoying monstrosities.
Right!!! Tryna find ways in which the human brain can also be controlled… No red light is gonna bother me that much, in your face scientists!!! Hahahaha
If this research gets to humans, and gets into the wrong hands, it could turn into kingsman.
The quality tho 😍😍
2:43 sweet flip bro
No, I'm still gonna swat it
I must know the music
very cute when a seen closely , I want one
I thought they made up the thing about fruit flies with white eye as part of the lesson
Wow what an amazing video. Keep it up.
…The flirty flies are a male and a female, while the fighting flies are both male. I hope they tried both scenarios with different combinations of sexes, or it really throws their findings into question, if indeed the cause of the behavior was different frequencies of light.
0:46 attitude adjustment fruit fly style
chevelle sings "SEEING RED AGAAAAAIN!!!!!"
When they fight it looks like you and your brother or sister are fighting for the last pizza
I will destroy all these flies if they enter my home. But I love their science lol
Haha imagine if they could find a link to do this to humans 😂
Genes don't make people sick, diseases which effect the genes, cells, body systems make people sick.
World star!!!
Better treatment or manipulation. With the way humain are ,,evolved,, right now, surely the latest…
0:24 that back flip though
On a battlefield, shine the correct intensity of red light at the enemy and the enemy would want to flirt instead of fight. 2:48
They are super cute.
So cute in this video😍
Not so cute in clusters in someone's kitchen 😝
Why would we thank them when they are on our food. They are the ones free and not in the laboratory working.
AND HIS NAME IS FLY CENA
come on college boy
I will use fruit flies flirting techniques to flirt with the female.
Wait, but didn’t they say they where both males
I mean there’s bdsm so I’m not surprised
Lol
Watches vid then goes into kitchen and kills the remaining flies without a thought
I need to install red headlamp to my bike
I need to install red headlamp to my bike
These animals really know how to duke it out.
I love them 🙂 https://youtu.be/SCnN-rytHqU
Who has been binging this series🙋♀️
You should try different color lights
0:40 RKO OUT OF NO WHERE! XD
0:24 YEET
Hubert mmmmms in the background.
Where those two males
i love your videos but i find them a little short on information. I hope it can get better
In a way, they literally were having them "See red"
0:34 when you give it your best shot yet you still fail
Thanks for what ?
I've read enough Mills & boon and fan fiction to know where this was going
They look like bees!🐝
Am i the only one?
I will definitely buy a red light like that, if I can't get rid of the flies I might as well watch a spectacular show.
So, now you see from where domestic violence comes. You "see red" and everything changes from love to fight. Not a big surprise here.
Now time to use this tech to make these pests go extinct in the wild.
In Australia we have sterile fruit flies that are released into the population to stop fruit flies ruining our fruit with maggots.
Ok, I'll say thanks before I kill them all next time.
The only thing fruit flys are good for is feeding to baby praying mantis ( nymphs) they love them 😆
Thanks, fruit fly but
YOU PICKED THE WRONG HOUSE FOOL
I hate flies.
When this Research will be concluded ?
Nope, just proves what I’ve said all along! Fruit flies are a collective that’s out to get you!
They WILL follow you from room to room just to buzz in your ear when you’re falling asleep! They Will find you, you may block your ears, but they find a way to be heard.
*I was tortured as a child by a mob of fruit flies determined to make me ‘one of them’ 😱
That one wing flirting is looking kind of cute.
THIS EPISODE IS SUPPORTED BY skip
Amazing
this is how fruitfly fight uhh wierd??
Y’all literally making flies to scrap .-. . I HATE y’all
What light is that
Those moves were fly
some human would control other to rule the world
"Más me pegas, más te quiero" lógica.
*Sees fruit fly in ma banana
Adios fly
YEEET
Fantastic.
They are just Saiyans trapped in a fly's body.
I guess nature ran out of DNA in the pool and make fruit flies have similar genetics.
These flies fruity.
Kung fu fly