Why is there less variation in humans than other species?
 

There are dogs that are tiny weighing 6 pounds fully grown and there are dogs that are monsters weighing 200 pounds, and they're appearance varies wildly between breeds. Why don't humans vary as much? I guess there are other species that don't vary much either - every dolphin I've ever seen is a dead ringer for the next one, primates don't vary much.

Those extremes in dogs are the results of 100's of generations of selective breeding of the traits by human intervention to create the variations you see today.

It's basic genetics...learn about it.

Humans haven't been selectively bred for certain characteristics, dogs have.

All the breed of dogs are a result of human intervention: Pugs would have been standard wolf-like creatures 50,000 years ago. By a process of artificial selection, humans have created 'designer' dogs that look a certain way.

Wait till we all drop our pants. I'm sure we see some variety hidden there...:upsidedow

Humans have been travelling the world and interbreeding since humans walked out of Africa.

No not really, if you look at any studies of human penis size the majority fall within a couple of inches - we see huge black dicks in porn because ........ it's porn and nobody wants to see a black guy in porn with a 6" dick.

What about same question regarding moose? Giraffes?

Most dogs have lived their entire life and died in less time than it takes a human to be ready to start breeding.

Are you asking seriously?? Dogs are a product of eugenics.

all humans look the same? is this a dig at the chinese?

it's a dig at all of us - height and weight there's not a big variation in humans, and there are really only a handful of different looking 'races' - caucasian, black, asian the three most different from each other. i think the term the geneticists use is 'phenotype'.

This is true - now that I think of it, the dog seems to have the most variations of any animal. You don't see anywhere near the differences in domestic cats - imagine a 200 pound domestic cat.

http://1.bp.blogspot.com/-PM9ad46vq5...r+recorded.jpg

http://www.dogbreed4u.com/sites/dogb...g-breeds_0.jpg

Why so much more selective breeding of dogs versus other animals?

What's funny about this is we think all Asians look the same, and all Asians think whites look the same, and vice versa for blacks.

Height - Pretty sure the smallest human is about 3 foot, and the tallest is over 7. Just guestimating. I'm talking "fully grown adult".

Weight - No idea who is the lightest and heaviest..... But I bet there is at least a 200lb swing between the 2.

Race? if we wanted to to uber racist in our human society I bet we could come up with more than standard 3 that seem to be peddled. (Caucasian, Mogoloid, Negro.) There are "sub" races here: http://upload.wikimedia.org/wikipedi...b11_s0476a.jpg What about if we looked at ancestry and then chose race and called that a breed?

What about Monkeys? The smallest fit in the palm of you hand, the largest would bite your hand off.

don't forget with humans you can also classify by male/female

I own a liger.

also, you're forgetting that sure, with dogs you have eg alsation, labrador, pitbull, mastiff, rottweiler, and so on. But with humans you have eg larry, joe, danny, mark, peter, paul, lionel, brian, carl, robin - and MANY more besides :2 cents:

You gotta be retarded thinking humans don't have the widest variation of looks on the planet.

Alexander
Ignacio
Jon
Dexter
Jacob
Jimmy
Kim
Karl
Roger
Brendan
Ben
Merle
Bob
Santiago
Ramon
Milton
Jessie
Malcolm
Ismael

I could go on.

http://humanorigins.si.edu/sites/def..._landscape.jpg

Dogs probably don't notice that many differences in other dogs. They like to choose their mates by scent more than sight.

I'm glad you asked:

Don
Jean
Dwayne
Emmett
Tommie
Nicholas
Marlon
Ron
Lloyd
Allan
Gerald
Kirk
Calvin
Homer
Drew
Rickey
Dustin
Fernando
Johnny
Jimmie
Boyd
Lowell
Preston
Jermaine
Terence
Earnest
Alfred
Felipe
Otis
Taylor
Emanuel
Stephen
Roland
Dan
Clyde
Jerry
Marvin
Matt
Christopher
Victor
James
Frankie
Elmer
Nick
Rogelio
Kelvin
Donnie
Saul
Shannon
Carl
Cornelius
Kenneth
Sammy

ha - i just saw the dancing otter gif on a sports forum and loved it, had no idea where it came from.

moar

have luck!
https://lh6.googleusercontent.com/-N...58/courage.jpg

https://www.youtube.com/watch?v=qmFKd1ZAAxM

But actually it's true, humans have little genetic variation, there's a hypothesis that there was a near-extinction event in the distant past and human population was reduced to about 2000 individuals. So two chimps from the same jungle have more genetic variation than a Swede and a Mongolian

this is what we was thinking, many species look similar, tell a mallard from another or a lion from another, (although, realising, lions are another breed of cat or mallard a bird.) maybe a Koala or crocodiles, dogs do vary in breeds, similar to races with colour height & size. Also a big difference in humans, the way we act, or react :2 cents:

Go back 100,000 years ago (or possibly less), and there were several co-existing species of human.

:1orglaugh :thumbsup

Anton
Foster
Morton
Stephan
Antoine
Nolan
Raymundo
Bertram
Hunter
Leonardo
Rayford
Duncan
Jere
Logan
Jarrod
Lazaro
Ashley
Xavier
Isreal
Jamey
Walker
Reid
Kip
Britt
Gayle
Johnathon
Johnson
Monty
Chi
Waylon
Lane
Chas
Daren
Weston
Dong
Val
Jamar
Mary
Nicky
Mitch
Gail
Chuck
Emerson
Gale
Dominique
Wes
Chadwick
Rosario
Edison
Neville
Maynard
Lenard
Kennith
Adolph
Darron
Emory
Aldo
Gaston
Moshe
Felton
Titus
Bryon
Hal
Eloy
Minh
Rich
Filiberto
Garret
Carmelo
Oswaldo
Tyson
Carson
Jame
Gaylord
Ike
Toney
Carter
Robby
Vern
Cordell
Collin
Richie
Jeffry
Junior
Isaias
Trenton
Brendon
Robt
Hosea
Vance
Kraig
Dudley
Freeman
Deandre
Dylan
Claudio
Russ
Wilton

Actually, its a bit of a mystery as to why dogs have so many breeds! yes, they are created by humans but in theory, we shouldn't have been so successful in doing so.

i guess dog god put some magic into it :)

It isn't a a big thing, think carefully, how much variation in breed!

You have Damian & divvy, 2 obvious individuals, one has nothing, he follows the other around like a lap dog. Catching onto negativity. Then there is the obvious winner, the playboy, the business man, the worker, the go getter, the maker. Some maybe not so obvious, but still working, and the follow on, the relaxed affiliate that makes his work & due money from making life like a retriever, by seeing what people want & get.

we're all the same, dogs, humans, we're all animals at heart, what one are you? :thumbsup

dogs aren't racists, humans are

Not that much of a mystery, selective breeding can produce very big difference in appearance, yet small in terms of genetic diversity; Dogs have big differences in how they look, size etc but not that big of a genetic diversity.

With selective breeding you can produce a lot bigger diversity than nature ever will, in natural selection anything that doesn't work well dies off so only the breeds that are best in adapting and surviving go on (basic evolution)

So basically there is the answer nature does not crate such big diversity as selective breeding

I am sure if some advance aliens drop on our planet and make us their pets, there could be much bigger diversity in humans too as they won't be satisfied with so few breeds

Good one. :thumbsup

I actually hate people think humans have races.

I thought that the beat thing that the nazi's could make to the humanity was to create (accidentally) an immense hate against racism. But today many people still takes the racist discourse in a positive way.

The progressive idea is to forget about skin colour and love the "sameness". The retrograde way is to "recognize" the "speciality" of each skin colour and love the "difference".

This also happens with feminists, some of them are crazy enough to defend the "difference" between men and women, and protect the women of being "man"-ized or "male"-ized, arguing that there is "something special" in being a woman, which is of course special because men have not that.

But this kind of discourse, which celebrates "differences" only takes to segregation and inputs the thought of discrimination in every individual that gets convinced by it. "Oh, I am a female and therefore I should have different rights, as I have different needs and capacities than a male"... "We should have different laws too, and a different murder called 'feminicide', because killing a woman is not like killing a man"... And with this ideology, they start to segregate women and men; in some countries there are zones in the trains and buses where is forbidden for men to get in, a segregation justified with the discourse of "difference", and explained saying that men are too aggressive and bad that they cannot be on the same wagon where is a woman. An idea that is so stupid and with terrible consequences, in the same manner that male exclusive and female exclusive schools are hazardous too: in the end, the separation of them does not allow them to learn to live together, with each other, instead, the women and men of the train never learn to behave properly to each other, and the schoolgirls and schoolboys get very disappointed when they do not get the treatment they expect from an individual of the opposite sex.

The same may happen with the "love" of the "difference" with the so called "races". A woman might be worried about being with someone of another "race", thinking about stupid racial frivolities, which could in the end lead to the rejection of some man because he is not of her race or he is not pure enough, or he is this or that...

Not to say that also there are plenty of humans, I bet more than 50%, that could not be classified under the unscientific idea of race.

As if humans didn't try to kill all the different humans since the beginning of time; thus eliminating different types of humans.

What a dumb fucking question.


.

Variations in species only exists to those species that can recognize it.

A snake has no idea what type of frog it is about to eat, but only knows it is a frog.

A butterfly has no idea what type of flower it is eating from, only that it is colorful and has nectar.

Well our species are ethnicities.

A lot of dogs don't like black people although I don't know if they are scared of them by physical appearance or what the reason for aggression is.

We had a dog who barked at black people seemingly way more than at white people - I wish some psychology department at a university would do a good study to see if it's true or just something people are imagining or exaggerating about. They do so many useless studies, at least this one would interest a huge audience.

every human is different size color shape weight ...some work all day..some sleep all day..some are highly intelligent some are idiots...some are nice ..some are mean some love water some love land..some fly some live underground.

Drinking and science don't go hand in hand I guess? Selective breeding for hundreds of years vs civilization (non selective breeding over the course of thousands of years)


We are almost all genetically identical, our variations are almost non existent compared to any range of species. How is it possible you are wrong this often? Seriously..

yes, because everyone knows war has a larger impact than breeding does.. wait...

You're an idiot.

http://en.wikipedia.org/wiki/Genocides_in_history

:2 cents:

my god.

8char

I wasn't talking about nature but selective breeding, science cannot explain why dogs produce such amazing variety and that is a fact. look at cats, they get subjected to just as much selective breeding but only really have hair variations. No other creature that mankind has breed (reindeer, cows, pigs, etc ..) can come anywhere near as close to the diversity of dogs.

Good point

what do you base this 'hair variations' opinion on?

Actually it's very simple.
Dogs react to their owners and when the owner becomes tense the dog senses that and becomes protective.
It's not about the dog; it's about how the owner of the dog reacts to blacks.
The dog becomes trained of the threat by sensing the owner's reaction to the presence of the threat.

:2 cents:

But we could be even more simple and note that you whine enough about blacks that this
behavior would be expected of your dog.

Quit blaming the fucking dog; dog.

:2 cents:

Considering evolution says every mammal on the planet evolved from something like a jurassic vole, I'm not sure where you're getting this notion from.

Humans aren't being bred for traits so children tend to revert to the mean, NBA player marries a normal sized gal, their kids aren't quite so tall. Steven Hawking marries his nurse, the kids aren't so bright.