Why Are Mules Sterile?

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Horse plus donkey - it seems like an unlikely combination. I mean, they're different species! And yet, when they get together, they can produce a mule or the lesser-known hinny. Either way, those offspring usually can't become parents themselves.
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Sources:
www.mulemuseum.org/history-of...
www.horsetalk.co.nz/2016/10/2...
genetics.thetech.org/ask/ask225
www.genome.gov/genetics-gloss...
www.labroots.com/trending/vid...
www.yourgenome.org/facts/what...
link.springer.com/article/10....
medlineplus.gov/genetics/unde...
www.denverpost.com/2013/08/16...
www.denverpost.com/2007/07/25...
Images:
www.istockphoto.com/photo/don...
www.istockphoto.com/photo/the...
www.istockphoto.com/photo/hor...
commons.wikimedia.org/wiki/Fi...
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commons.wikimedia.org/wiki/Fi...
www.istockphoto.com/photo/im-...
www.istockphoto.com/vector/me...
commons.wikimedia.org/wiki/Fi...
www.istockphoto.com/photo/cel...
www.istockphoto.com/photo/nor...
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25 июн 2024

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Комментарии : 849

@Bigfoot_With_Internet_Access 3 года назад

There's a mule watching this rn realizing that his wife shouldn't be pregnant

@DrMateen36 3 года назад

Well.. Its still possible.. I mean there are few reports.. So may be be more optimistic ehh?

@familiayoutuber4769 3 года назад

@@DrMateen36 Sorry bro, I'm sure he wasn't throwing an indirect on purpose.

@impeachy1518 3 года назад

😂😂😂

@-Devy- 3 года назад

@@DrMateen36 Jokes. Have you heard of them?

@watchman835 3 года назад

@@DrMateen36 Yeah, good luck to convince the wider family with that...

@nissanownsyou 3 года назад

Phew! I was really worried mules were taking over the world. Thank you SciShow. I feel much better.

@boxgrater 3 года назад

Thought you were serious until I finished the vid

@lindadobson9854 3 года назад

Hahahaha

@mudkipwave8154 3 года назад

Mudkip!!

@ODST_Republic 3 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ZoSiquMuBM4.html This isn't a Mule but, it's one if it's parents

@HermanVonPetri 3 года назад

Close. What we really need to worry about is jackasses taking over the world. But I think we're too late on that one.

@militantpacifist4087 3 года назад

Because they’re as stubborn as a mule when you tell them to have kids.

@nimaxx 3 года назад

that a mule or donkey is 'stubborn' is a human interpretation that has become a myth. the 'stubborn' reaction of these animals is actually their state of fear, which becomes worse the more brutal the people are with them.

@l.zevicreations 3 года назад

@@nimaxx It's just a lil' joke, it's not meant to be taken literally! and it's not like I don't get what you're trying to get across, i perfectly understand what you're trying to say.

@LeoStaley 3 года назад

Mules are so awesome. They're definitely smarter than either parent.

@datt5698 3 года назад

You heard of that story where the mule curb stomps a mountain lion that was hunting his dogs? True story 100%

@badger305 3 года назад

That ain't saying much.

@datt5698 3 года назад

@@badger305 you act like a badger

@badger305 3 года назад

I was speaking of the comment, "Mules are so awesome. They're definitely smarter than either parent."@@datt5698

@datt5698 3 года назад

@@badger305 too bad they are infertile huh!?

@adueso3287 3 года назад

i have an accounting exam in a few hours, i hope mules show up on the test

@Jake3eee 3 года назад

Did they...?

@ariannasilva4462 2 года назад

Did it?

@adueso3287 2 года назад

@@Jake3eee @Arianna Silva sadly no but i still got a good score so im not mad

@haveagooddaytoo 3 года назад

Sic show giving us the answers to questions everyone wants to but no one asks

@tylerdurden788 3 года назад

One of my friends loves how I know such obscure information.

@hk7059 3 года назад

@@tylerdurden788 Which friend? The one everyone calls 'The Narrator'?

@Femaiden 3 года назад

the answers nobody wanted, but the ones everybody needed.

@nirorit Год назад

I asked

@siobhantheprawn 3 года назад

"Why does he call you donkey?" "Oh, he aw- he aw- he always calls me that"

@rustyshackleford4338 3 года назад

Not knowing this all my life makes me feel like a jackass.

@traildoggy 3 года назад

"My mule don’t like people laughing,” -- Clint Eastwood

@aaronstark5060 3 года назад

Dammit, I was going say that, lol!

@TheN0odles 3 года назад

Sister Sarah entered the chat

@nottodayfolks4923 3 года назад

Get 3 coffins ready. My mule don't like people laughing at him. Of course if all you apologize I don't think it's nice you laughin. he gets this crazy idea you're laughing at him.And if you apologize like i know you're going to. Then i'll consider you didn't mean it. BOOM BOOM BOOM BOOM My mistake 4 coffins.

@TheN0odles 3 года назад

@@nottodayfolks4923 bravo

@badger305 3 года назад

"He gets the crazy notion you're laughing at him." Now we know why, he's missing a chromosome.

@nunyabiznes33 3 года назад

I guess this also mean I can go out without fear of a horde of ligers suddenly showing up to kill everyone.

@datt5698 3 года назад

Horde of ligers is a magic the gathering card

@AutoCrete 3 года назад

I think big cats are much easier to hybrid. Chromosome count perhaps???

@biggusdickusiv5883 3 года назад

Napleon dynamite told me they have a high magic stat

@stanleyhape8427 3 года назад

@@AutoCrete that idiot tiger king was trying to recreate the saber tooth Tiger by cross and interbred big cats.

@FilmerOfBobcats 3 года назад

Several of the big cats actually are able to produce at least partially fertile hybrids. There have been several cases of people breeding a tiger to a lion x tiger hybrid or a lion to a leopard x jaguar.

@RohitPant04 3 года назад

These are questions i would think to myself back in the classroom of my school. I am so glad at the power of internet to provide a relief to my questions. Life is a process of learning indeed!

@ExtremePotato 3 года назад

I could listen to her talk about animal breeding and genetics all day.

@alexanderherzog3064 3 года назад

Coming on a little strong buddy

@xres1329 3 года назад

@@alexanderherzog3064 Understatement!

@jameshenderson3238 3 года назад

She is a great genetics instructor

@kirkmorrison6131 3 года назад

I love mules, if you know how to handle them they are great. You can teach them to plow and cultivate. If you give them enough room to turn, they won't if trained right , they don't step on the crops. Horses will often take a short cut and trample the end of the rows unless you're very careful. You have to watch them like a hawk.

@christopherparks2987 3 года назад

My mother's boyfriend uses mules to train horses.

@kirkmorrison6131 3 года назад

@@christopherparks2987 A good technique

@teawrecks1243 3 года назад

But can you crossbreed a donkey with a gorilla to make a Donkey Kong

@SofaKingShit 3 года назад

I had wondered about one of my donkey's ancestry since he's pretty horsish looking but turns out it's just normal horshisness lol. He's splendid nonetheless.

@brandynamite3022 3 года назад

is that your donkey on your profile pic

@gregoryfenn1462 3 года назад

@@brandynamite3022 I hope so, he's very hansome :)

@NJ-wb1cz 3 года назад

@@gregoryfenn1462 yours is very handsome as well!

@hiltonchapman4844 3 года назад

@Cupid Stunt: Cool username!

@nokiot9 3 года назад

I think I asked y’all about this last week! Thanks a ton for answering it! 👍👍

@Inannawhimsey 3 года назад

Yuppers, just when we make a rule, we find out there are exceptions :3

@Inannawhimsey 3 года назад

@Patrick Hudson Hello there. I do hope you are holding those you care for close and helping those you can in this global insanity.

@travcollier 3 года назад

Biology: there is an exception to every rule, including this one ;)

@Joeydoesmedicine 3 года назад

Is it an exception or is it just a special case? Words words words

@Inannawhimsey 3 года назад

@@Joeydoesmedicine exceptions are where the fun is :3 Here's to more Adaming

@mathewritchie 3 года назад

Natue is full of exeptions humans make rules to make it easier to understand the world biology is often messy and ignores us.

@adrob3160 3 года назад

Hey SciShow. Why do we keep messing with things that hurt? Like a cut or a nail that is cut too short?

@ScumfuckMcDoucheface 3 года назад

Oooooh good one! Upvote SoOoOoOoOoOo much. =)

@bertaboy9078 3 года назад

My guess would be pain releases endorphins, so the more you play with it the less it hurts. Idk

@cristianvillanueva8782 3 года назад

This

@wendyleeconnelly2939 3 года назад

or you're trying to fix it, only to fail

@LongToad 3 года назад

I'd say your body is only as smart as evolution needed it to be. Survival of what's "good enough" is all that's required. Pain and itchiness save our lives but like with everything, they have negative side effects; like spreading a rash, purposely shocking yourself, or opening a wound. Best to just realize our compulsions and resist the best we can.

@fuba44 3 года назад

This episode turned me on to your podcast, and i love it! Can recommend.

@hardworkingcriminal4873 3 года назад

This was interesting. I knew this was the case but I'd never known the science behind why. This was well explained.

@freeforall6562 3 года назад

Thanks. Finally a clear understanding of the facts

@debrawineland5709 3 года назад

Wow, I’m so overwhelmed!

@b-rextheprgoddess1872 3 года назад

So if the chromosomes don't work for mules and hinny offspring to have their own offspring, what I have always wondered is how in tarnation does a horse and a donkey having a hybrid kid in the first place? 🤔

@shyammajumdar3491 3 года назад

That's really well explained....Thanks a lot..

@Thepuffingyank 3 года назад

come on people. im disappointed. what a half ASSed effort in the puns

@dynamosaurusimperious2718 3 года назад

Nothing is great than seeing a great SciShow video Also I wish y'all a great day

@drewharrison6433 3 года назад

I actually knew this but I love hearing conformation of my knowledge. Although the explanation wasn't technical it was easier to understand than the fu story of meiosis. Not to be confused with mitosis.

3 года назад

Do you know why each pair of homologous chromosomes match during meiosis?

@drewharrison6433 3 года назад

@ I do not. I will research this. I am intrigued. My knowledge of genetics is several years old now.

@antoinepinnock1777 3 года назад

Beautiful explanation

@victormalyar9200 7 дней назад

Now mules are being cloned.

@jorgerangel2390 3 года назад

Love the content, and the host, she is so good with this kind of videos

@PaleGhost69 3 года назад

Please consider doing a video on permaculture and urban food forest.

@karendegraaf1146 3 года назад

Always an exception....I remember an article in Western Horsemen magazine in the 70s titled Never Say Never about a female mule who reproduced several times, once with a Saddllebred stalliom.

@joedellaselva1251 2 года назад

Rose Bear Don't Walk is adorable and smart!

@Daehawk Год назад

I always wondered about this. Fascinating. Well I watched the rest of the video and now my head hurts.

@aliamini8478 3 года назад

very informative. thanks

@arthanor9631 3 года назад

2:25 That was a weird jump. The odd chromosome was always going to be unmatched since there's no other chromosome. It has nothing to do with pairs being made up of similar or different chromosomes.

3 года назад

In meiosis, the homologous chromosomes pair each other by sequence complementarity. There’s no one odd chromosome either since the different chromosome number in each parent is the result of either a fusion of two ancestral chromosomes or a split of one chromosome in the lineage of one of the progenitors.

@brendaleverick3655 3 года назад

Interesting! Thanks for the info. 🐎🐴

@roderickfiske4769 3 года назад

At last , infinite gratitude, WELL DONE, I’m whinnying with pleasure.

@Hunter-fs1nj 3 года назад

I will say from personal experience, the emotional communication of a horse and the independence of a donkey is highly useful. For centuries they have been used to lead herds of animals for that reason.

@michaelarchangel1163 Год назад

Emperor Vespasian smiled in Heaven at this video. There are horses and donkeys near the care home where my mother now resides, here in Wales, but I've never personally seen a mule or hinny in the UK. There's still time, I'm only 65.

@stegosteg5247 3 года назад

Rose Bear Don't Walk is the best host!

@RedRose-gm6px 2 года назад

Well dammnnn I definitely learned something new today. Short simple and well said information, thank you.

@DanMan0715 3 года назад

Something I've been wondering about: How did species evolve different number of chromosomes? At some point, one member of the species would have gotten an extra chromosome. Hypothetically, a chromosome splits or maybe it is born with an extra copy due to meiosis misfires. Wouldn't that member of the species have non-homologous chromosomes from every other member of their species? Isn't this what makes mules sterile? Would two members need to have similar or analogous mutations to be able to breed a new species?

@jannatulnaim547 2 года назад

People with Down syndrome or trisomy 21 for example can rarely reproduce. There’s a very low chance so they’re most likely sterile like mules for the same reasons. So this applies for all the individuals.

@PaiviProject 3 года назад

Wow. I didn't know none of this. That was interesting. Thanks 👍

@pennyanteracing 3 года назад

I'm glad you addressed female mule fertility at the end of this video. I'm really surprised you didn't mention Haldane's Rule.

@martinbonny9880 3 года назад

We need more of Rose she's good

@KanishQQuotes 3 года назад

My grandma owned mules only, she said that dumbest mule is smarter than the smartest horse

@FilmerOfBobcats 3 года назад

My grandparents would agree with her wholeheartedly.

@n3gi_ 3 года назад

"female horse and a male donkey" "Lucky Bastard" -A Single male horse

@reggiefurlow1 3 года назад

This explains some humans. Thank you i love this channel

@JackFoxtrotEDM 3 года назад

“DON’T TOUCH ME, I’M STERILE!”

@alexiswelsh5821 3 года назад

A world run by hybrids, that’s Avatar. Platypus-Bears, Armadillo-Bears, Wolf-Bats, Badger-Moles, etc.

@finlayl2505 3 года назад

You forgot bears

@alexiswelsh5821 3 года назад

@@finlayl2505 Just bears? Like Basco?

@ObitoUchiha-jc4nh 3 года назад

One piece did it first

@threecatsdancing 3 года назад

You know how our phones are listening to us all talk and you'll be talking about something with your husband or wife or friend about, let's say, lawn mowers. You're not looking for a new lawn mower but you're talking about a lawn mower and all of a sudden on Facebook and Instagram all your ads are about lawn mowers. Yesterday, my husband and I saw a mule at the veterinarian's office and since it was the first time either of us had ever seen a mule we spent a few minutes talking about mules and about why this particular mule had been gelded. And today SciShow has posted a video about mules. SciShow, are you listening to us through our phones too? 😬🤣 (Also, you know the next ad I see on Facebook is going to be for a lawn mower.)

@FilmerOfBobcats 3 года назад

My granddad used many mules in his day for farm work and family transportation. He vastly preferred them to horses because of their intelligence and stamina. However, he was well known for say, "Ain't nuthin meaner nor more useless than a stud mule." You get all the studdy behavior but without the benefit of an animal that can create life. So mules are gelded young.

@fakjbf3129 3 года назад

I'll never forget one of the early Assassins Creed games (either AC2 or AC:Brotherhood) where Ezio finds a note that uses the phrase "infertile as a donkey" and it immediately killed my immersion.

@harleyfagan9637 3 года назад

This is wild I was just thinking about this the other day and I popped up in my recommended.

@GaasubaMeskhenet 3 года назад

I would like to know more about the exceptions please

@GaasubaMeskhenet 3 года назад

If you can, please help my soon to be evicted family Only covid protections kept us safe. Go fund me in the descriptions of my videos

@TheWtfnonamez Год назад

This is a masterclass in explaining everything so badly that people forgot the point you were trying to explain in the first place. It was something about dragons and your next boob job right?

@MrJayb76 3 года назад

The Zebra is now very confused.

@digitalesklassenzimmer7278 3 года назад

Can you make a video about this: Why is a "left-over Chromosom" a big deal? Why is having another building plan (in addition to already enough building plans) a big deal for a cell/individuum? Is there a managing problem which results in weird proteins that don't work as intended? Does it have to do with expression / inhibition of certain gens? Would appreciate it!

@dafttool 3 года назад

Our future mule overlords laugh at you. Muwahaha Hee haw.

@MooseSquirrelX 3 года назад

Great video! I would love a video on how we humans have 46 chromosomes but our nearest living monkey relatives all have 48 (chimps, apes, and orangutans). Are there any theories on how this came about? Is the thought that our monkey cousins developed an extra pair after we divided from our last common relative, or did humans lose a pair during our evolution? And how would that work when it happened? Say an individual is born with the mutation of having a different number of chromosomes then their species population, it would seem difficult for them to reproduce (just like the mule and hinny), so how can individuals with the new chromosome number get numerous enough to become the new population?

3 года назад

They didn’t lose anything. An individual with a whole pair of chromosomes less wouldn’t be viable. The chromosome number got reduced because two chromosomes fused together.

@halloranedward 3 года назад

Donkeys are so short they have to build him a little ramp.

@FilmerOfBobcats 3 года назад

It's definitely been done, when the jack is a lot shorter than the mare.

@aidanclarke6106 3 года назад

Attack of the Mules, soon in theatres.

@edsoderlind7568 3 года назад

thanx

@flaviogalhardo1358 3 года назад

Not sure if any other comment was made before, but this would have been an excellent opportunity to explain gene introgression as ways to species diversification and speciation.

@Carebearritual 3 года назад

will rose ever be on scishow!!!!

@rajanogray9088 3 года назад

Many human beings have some Neanderthal ancestors (less than 2percent). How would this have been possible if Neanderthals were a different species? Just asking. I am genuinely curious.

@cosmicwakes6443 3 года назад

Rajano The genetic divergence wasn't that great to hinder fertile offspring.

@antoniousai1989 3 года назад

Less genetic difference between Cromagnon and Neanderthal, compared to Horse and Donkeys

@ElInextricable 3 года назад

That question is a can of worms because it messes up the current political correctness going on lol. You can get into trouble..

@ChiDraconis 3 года назад

The "route" of Genetic divergence is not currently known despite reasons to believe so; Correct work would get into such things as Dental Forensics to determine diet & Genotyping of Neanderthal · Smithsonian: Human Evolution Evidence » Genetics Ancient » DNA And Neanderthals » DNA: Genotypes And Phenotypes

@mal9369 3 года назад

Well, you have to keep in mind that the genetic distinction between phylogenies is something that we made up, it's not inherent to genetics. We dont have a perfect numbers based definition related to genes, species often just being defined as being different enough to be unable to interbreed. Organisms as they evolve drift slowly apart, with changes accumulating until two separate groups are different enough. However, what changes accumulate is different between different species, meaning there may be huge physical distinctions between two species, but they can still interbreed, or vice versa. This is the case with Neanderthals and our ancestors. They had been separated by time enough to be rather physically distinct from each other, but were still closely related enough to interbreed. Some theories even point to this ability as one of the factors that lead to the neanderthal extinction, with them being integrated to an extent into our ancestors species along with being outcompeted. Genetics is really interesting stuff!

@tk-zb6br 3 года назад

I grew up in western Missouri where mule breeding farms were common. Many thousands of miles were produced for the army in WW1. I've known a few hillbilly loggers who use mules for dragging fine veneer logs out of the woods.

@johnshields9110 3 года назад

It's a different world using mules other than machines. My old Dad in Kentucky kept a pair of mules till each passed any, using them for fencing chores. The strongest pulled a team wagon all by herself. We used her to haul out hay in the Winter to our cattle, and get a little garden plowing too. I still have her collar, hanes, and 3 blade plow in my basement. After I got big enough, I plowed tabacco rows for grass/weed control. You stirred up quite a few memories.

@fuferito 3 года назад

Farming and animal husbandry terminology for the mule was incorrectly applied to describe a person of mixed ethnicity, specifically where one of the parents is of African ancestry and the other is not, which resulted in the, now outdated, Spanish term, _mulato._

@spicybrown75 3 года назад

Oh....I didn't know that!

@xres1329 3 года назад

And in Hungarian the word "mulato" is a pub where you get drunk so don`t know who is your mate...

@i.cs.zamodits 3 года назад

@@xres1329 I mean. The prononciation is different.

@elibeth06 3 года назад

Used to think mules were just a nickname for donkeys, I had not idea that they were two different things!

@allenwilson9656 3 года назад

You must be from the city , cause you sure don't live in the country

@blaiseronstadt6306 3 года назад

Very good, I have had Donkeys, Mules and Horses,and been around them maybe 50years plus, I like them all, for their differences, I think Donkeys are my favorite, because the lack of Respect, they may receive, they are the oldest domestic creature, Well treated, they are Loyal Intelligent, Hard working, self preservation, Companion, will guard Livestock,as good as Dogs (another incredible creature) Next Time someone Calls you a JackAss. Say Thank You, it's a Complement

@huldu 3 года назад

It's very fascinating, not the sterile part but that there is a *chance* that it'll work. I wouldn't be surprised if it's the same story all over the universe. Something being very unlikely but then takes place. I think we can throw in life as it is into that mix as well.

@allanrichardson9081 3 года назад

In “Foundation and Empire,” The Mule conquered the galaxy but could not found a dynasty.

@alien9279 3 года назад

Oh hey- less than a minute ago:) loving scishow!!!

@lightbox617 3 года назад

OK. Serious? My Grandfather (WWI vet) had a farm. He bought a Mule because, Post war, army surplus Mules were as cheap as Indian motorcycles with side cars. They didn't "spook" around other animals. They lived forever (sort of) and they were very strong.

@businessideaschannel4178 3 года назад

Very good Mam❣️❣️

@Shinji_Dai 3 года назад

"Life...uh...life finds a way."

@mudkipwave8154 3 года назад

Mudkip mudkip!

@makeracistsafraidagain 3 года назад

In the 1960s we lived near Knots Berry Farm... before it became an amusement park. They always had a mule tied up all by himself. We would often go there for breakfast on the weekends and I would bring the mule an apple. He was very gentle and I still remember him clearly.

@FilmerOfBobcats 3 года назад

Mules can have wonderful temperaments if the parents are chosen according to that criteria

@ingibingi2000 3 года назад

You guys need to make a video on intraplate earthquakes

@iso-kun1644 3 года назад

male horse and female donkey seems like really mean to the donkey. like a chiwawa carrying a litter of great danes it just seems painful 😅

@sheepewe4505 3 года назад

Thats one of the reason mules are bred rather than hinnies. Also stallions tend to be more fussy about their partners than jackasses 😂

@erintubb9860 3 года назад

Some donkeys can be quite large, while some horses are small.

@Barbs_Collectibles 3 года назад

I learned something today 😁

@stevencampbell7394 3 года назад

Hot off the presses 🔥

@anambutt8127 3 года назад

The information i did not want. I needed it tho.

@andrewthacker114 3 года назад

Interesting thanks

@BakedPhoria 3 года назад

I'm trying to take this seriously but "Donkey" is such a funny word.

@FilmerOfBobcats 3 года назад

How about the Spanish term "burro"?

@tamsentempleman1544 3 года назад

I have always wondered.

@robertstack2144 3 года назад

You always get weird stuff from donkeycrats, usually detremental

@xres1329 3 года назад

It was not an important question in my life but I had to wait for an intelligent answer for 70 years of not being able even to guess. I can die in peace now, Thanx to you!🦄

@adamcheck4941 Год назад

Hipporiffs are the theoretical offspring of two fantasy species the griffon and a horse like mules are the offspring of a horse and a donkey.

@iainballas 3 года назад

To quote a great film "Life, uh... finds a way."

@mikecampbell5856 3 года назад

Every male mule is thinking, bring on the babes! Whoo Hoo!

@echohoneybee4793 3 года назад

Nice and Cool!

@Gashnaw 3 года назад

Wait, does this mean completely different species (Dog and cat) could reproduce as well? Or do they still have to be from the same family (Feline, Canine, Equine, Bovine, why do they all end in INE?)