Does a Chinese Shar Pei have wrinkly skin from a genetic trait?
493958
Yes, they were bred that way so when thye were fighting, if one dog was held by the neck, it could still turn to bite the other dog.
311457
The facial features of Caucasians are likely not so much an adaptive trait as they are either a linked trait, or due to genetic drift and the founder's effect.\n\nIf the population of Homo sapiens that initially settled in Europe had a larger than normal proportion of people with 'fine' facial features, these proportions may have been preserved through subsequent generations.  Much the same thing can be seen in isolated areas (such as many islands) where the inbred cat population has a higher than normal incidence of polydactyly (six or more toes).  It's not an adaptive trait, but in the absence of selective pressure/competition and no influx of more dominant genes, the trait survives.\n\nIf the trait was linked to traits that were adaptive (i.e. pale skin that serves to increase Vitamin D production), then the fine facial features would be selected for through natural selection.  Not directly, but because the fair skinned people also happen to have fine facial features.\n\nSo there may not be a 'point' to European facial features, they are simply a legacy of the history of the genes of that region.
167851
I think it is a matter of genetics and isolation/location.  On the flip side, look at most Asians and Polynesians.  They don't tend to have much body hair at all, live in warmer climates and are isolated for most part by location.
22851
Koreans tend to have sharper features than japanese, higher cheekbones, and are less likely to have epicanthic folds than Japanese. Also, they tend to have 'flatter' faces than Japanese.  Women also use earth tones - browns - and Japanese women tend to use reds (in lipstick and makeup).  Also, generally korean women tend to be taller, with sharper, more triangular heads - sharp chins, high cheekbones, sharper eyes.  Chinese look different depending on if their ancestry is from northern china or southern china - southern chinese tend to be smaller, browner, and have more rounded features. My fuzzy logic and heuristics work well enough to usually get it right though. When in doubt, listen to the accent. And this only goes for people born and raised in their respective countries.  American born asians get a look all thier own.
1150347
dark pigments in their skin...a genetic trait
43220
I agree with both the answers here also ,but may I add different people have different amounts of melinin in there skin which is determined typically \nby genetics although environment can also play a\nrole ,even if you may be freckle dispositioned genetically (which is typically very fair skinned people)Have much less melinin in their skin.You may not aquire much freckling if you use a very high sp sunscreen (this also applies in winter)or you can mimimize the possibility of freckling.Usually people who freckle easily do\nnot tan well.And are more likely to aquire \ncancers of the skin ,unlike their counterpart melanin enriched people.Or dark skinned people.\nThe pigment of genetic predertermined skin is\nnot difficult to predict based on ethenticity \nor even heredity.This does not exclude darker\nskin from aquiring cancers or freckles .Many\nmore caucasians are succeptible  to freckles \ngenetically and envriomentally than any other\nclassified group of humans.
378580
Did you ever notice the diameter of an Asian person's hair?  It is thicker than a Causcasians.  I am sure the sheer thickness has something to do with it.
1024109
Lack of pigmentation.
451673
Some people think it's because the skin expands to allow extra water inside. The expanded skin ends up looking really wrinkly. Other people think that it's because the skin is tied down to the tissue underneath in certain places. So when the skin is full of water, it swells up (gets puffy), but only in places where it is not tied down, which makes it look wrinkly.
28958
The evolution of the different skin colors is thought to have occurred as follows: the haired ancestor of humans, like modern great apes, had light skin under their hair. Once the hair was lost, they evolved dark skin, needed to prevent low folate levels since they lived in sun-rich Africa. (The skin cancer connection is probably of secondary importance, since skin cancer usually kills only after the reproductive age and therefore doesn't exert much evolutionary pressure.) When humans migrated to sun-poorer regions in the north, low vitamin D3 levels became a problem and light skin color evolved.\n\nDark-skinned people who live in sun-poor regions often lack vitamin D3, one reason for the fortification of milk with vitamin D in some countries.\n\nThe Inuit are a special case: even though they live in an extremely sun-poor environment, they have retained their relatively dark skin. This can be explained by the fact that their traditional animal-based diet provides plenty of vitamin D.\n\nAlbinism is a condition characterized by the absence of melanin, resulting in white skin and hair; it is caused by a genetic mutation.\n\nResearch on skin color variability:\nThe color of human skin varies from dark brown to pale pink. In attempting to discover the mechanisms that have generated such a wide variation in human skin color, Nina Jablonski and George Chaplin (2000) discovered that there is a high correlation between the coloration of the human skin of indigenous peoples and the average annual ultraviolet (UV) radiation available for skin exposure where the indigenous peoples live. Accordingly, Jablonski and Chaplin plotted the whiteness (W) of skin coloration of indigenous peoples who have stayed in the same geographical area for the last 500 years versus the annual UV available for skin exposure (AUV) for over 200 indigenous persons and found that whiteness W of skin coloration is related to to the annual UV available for skin exposure AUV according to\n\n    W = 70 - [(AUV)/(10)]\n\n(Jablonski and Chaplin (2000), p. 67, formula coefficients have been rounded to one-figure accuracy) where the whiteness W of skin coloration is measured as the percentage of light reflected from the upper inner arm at which location on humans there should be minimal tanning of human skin due to personal exposure to the sun; a lighter skinned human would reflect more light and would have a higher W number. Judging from the above linear fit to the empirical data, the theoretical maximum whitest human skin would reflect only 70 per cent of incident light for a hypothetical indigenous human-like population that lived where there was zero annual UV available for skin exposure (AUV = 0 in the above formula). Jablonski and Chaplin evaluated average annual UV available for skin exposure AUV from satellite measurements that took into consideration the measured daily variation in the thickness of the ozone layer that blocked UV hitting the earth, measured daily variation in opacity of cloud cover, and daily change in angle at which the sunlight containing UV radiation strikes the earth and passes through different thicknesses of earth's atmosphere at different latitudes for each of the different human indigenous peoples' home areas from 1979 to 1992.\n\nJablonski and Chaplin proposed an explanation for the observed variation of untanned human skin with annual UV exposure. By Jablonski and Chaplin's explanation, there are two competing forces affecting human skin color:\n\n   1. the melanin that produces the darker tones of human skin serves as a light filter to protect against too much UV light getting under the human skin where too much UV causes sunburn and disrupts the synthesis of precursors necessary to make human DNA; versus\n   2. humans need at least a minimum threshold of UV light to get deep under human skin to produce vitamin D, which is essential for building and maintaining the bones of the human skeleton.\n\nJablonski and Chaplin
648357
Not all NA tribes don't grow beards- the simple answer, though, is evolution.  Genetically, the stock of people from which NA came did not have thick facial hair-similar to other asian genetic stock such as the Chinese and peoples of SE Asia.
142552
neither africa nor asia are racially homogenous.  look at the vast differences between indians, arabs, and chinese in asia and pygmys, berbers, and black africans in africa.  there is huge variation.\n\nrace is not genetically significant.  people from the same race often show more genetic differences amongst themselves than they do with other races.  its just that we see skin and hair color predominantly and make the false assumption that these must be important indicators of genetics.  i don't know what caused differing hair and eye colors to evolve, but i am certain that these are very superficial traits which actually would have virtually nothing to do with whether the people are racially or genetically homogenous.
867443
OK people...here's the lesson for the day...this is an actual bonified case of a genetic trait that is actually inherited through birth....you will notice that it's not some sort of sickness or illness that we all like to pass off as genetic, but it's an actual physiological trait that can be attributed to a genealogical factor...ooooooohhh...amazing isn't it?.......it's just  pigmentation...nothing to worry about...actually kind of unique and cool...a genetic trait stamp like a birthmark, high intelligence or big feet etc...this is what we inherit genetically from our lineage...v cool...
530479
No. They are born that way. Well, at least the ones with brown skin are. Many are caucasian.
759462
Homozygous recessive?
461357
I think you inherited a mutated gene from your parents, as gingerness is an inherited mutation. Whatever you do DON'T pull the ginger hairs out with tweezers..or else your brown hair will be replaced by ginger hair..Why do you even have a beard anyway.
673869
I think you are looking at it from the wrong prospective, I wouldnt look at the melanin correlation in chimps or other great apes as to humans. Melanin is the pigment in our skin that helps protect us from the harmful Uv radiation that is present in our everyday lives.\n\n"Dermal melanin is produced by melanocytes, which are found in the stratum basale of the epidermis. Although human beings generally possess a similar concentration of melanocytes in their skin, the melanocytes in some individuals and races more frequently or less frequently express the melanin-producing genes, thereby conferring a greater or lesser concentration of skin melanin. Some individual animals and humans have no or very little melanin in their bodies, which is a condition known as albinism." Wiki. \n\nTherefore, you would see that certain races where melanin was more needed due to their living conditions would have more genes that would express the pigment. If you look at the trend of the globe, enviroments that arent on the poles or on the equator tend to have lighter skinned individuals.Its because they arent getting the direct sunlight/uv radiation that the people on the poles or the equator are getting.\n\nNow there is also the fact that there are different races of human and that these races tend to express pigments very differently from eachother. Such as why chimps are lighter skinned than gorillas... (not exactly a great example, but it will do) over long periods of time natural selection causes fluctuations in these trends, and now that we are seeing increased radiation, those that have stronger forms of melanin and a smaller predisposition to cancer tend to "pass on their genes" or have better reproductive success. Now, this is all relative and I could probably go on for hours about it, but in todays society since we arent nomadic / are particularily sedentary, if you tend to have darker or lighter skin colors it is due to your heratige.