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Evolutionists, a question for you?
I am seriously asking this question without jabbing at your views. How did races come along with evolution? Did they evolve into that somehow? If so,how? By the way, I'm a creationist, but I want to hear you out.
Ok. I am still not jabbing at your beliefs, I am just debating respectfully, but the geographical location wouldnt effect the DNA/Genes of a person, would it? So how are black people reproducing and getting more black people, and same with white people, and asians, ect...
Ok, thanks. But can someone explain how sun exposure can effect genes?
21 個解答
- 匿名1 十年前最愛解答
races are an inherent property of evolution... if you knew at all how evolution works you should know the answer to this..
a "race" (in the sense that i think you're using it) is what populations turn into before speciation
there are currently three human "races" caucasoid, mongoloid, and *******...
if human culture didn't develop so much and global travel made the transfer of genes between races so readily available.. it's very likely that the three races could have diversified more and eventually become three separate human species
there are "races" in all species (though they are usually called breed, variants, or populations)
robins (the bird) on the east coast are different from those on the west coast
humpback whales in the pacific sing very different songs than those in the atlantic
the freckled hawfish has very different color patterns based on where it lives, almost to the point of thinking they were seperate species
races, subpopulations, variants, etc exist because evolution does
"Ok. I am still not jabbing at your beliefs, I am just debating respectfully, but the geographical location wouldnt effect the DNA/Genes of a person, would it? So how are black people reproducing and getting more black people, and same with white people, and asians, ect...
Ok, thanks. But can someone explain how sun exposure can effect genes?"
you still somewhat don't understand how evolution works...
sunlight doesn't "MAKE" people dark (not as far as evolution is concerned anyways)
ALL populations have inherant variations.. some black people are lighter and darker than others. if say there was a period of time where sun exposure was particularly high, even the black people with somewhat light skin would be negitively affected (a slight increase in sun related health problems) cause the fairer skinned people to have ON AVERAGE slightly fewer children than darker people (who wouldn't be effected by the increase in exposure) thus black people would become "blacker" as more and more of the darker skinned people reproduce and fewer of the fairer do
random variation within the population is selected for by the environment, the environment doesn't induce change in a population directly
- Bob BLv 71 十年前
Sun exposure doesn't effect genes directly, but it does determine which genes have an advantage:
Mutations and recombination would have allowed for different shades of skin colour to exist anyway. In African populations, a small number of people would have had slightly lighter skin than others.
Further north, the lighter-skinned ones had an advantage, and so they could survive and reproduce more than the darker ones; eventually the number of light-skinned genes increased and became the norm- in those areas anyway.
Understand now?
- 1 十年前
Skin colors evolved with their exposure to the sunlight. People in Africa have very strong sun and stayed out for a very long time in the sun. Whereas in Ireland, the opposite. Also, although we are the same species, it can vary greatly from one side of the world from the other. Certain races in certain areas will develop things that people on the other side of the world may not have developed due to the fact that they just don't need it. It's the basics of evolution, really, on a larger, more complex scale.
- 1 十年前
Yes, races did evolve according to the climate of the places people lived in. First humans originated in Africa, so they were black because they had more melanin in their skin to protect it from high levels of solar radiation. As humans moved into colder climates, like Europe, their skin became more white because they didn't need so much melanine anymore, that's because white people get worse sunburns than black people.
Of course climate is not the only factor that determined race, but i think it's the most important.
I just read the comment youadded to your question. Of course the climate and geographic location doesn't affect the DNA in one person, but it does affect it in a species overtime. A bear that goes to the north pole doesn't turn white to be invisible to their prey, but that bear will have offspring that will have slightly lighter or darker hair. The little bears with lighter hair will be more likely to survive than the darker ones, and that will be passed on to their own offspring. As a result, polar bears become white over a long period of time.
It's called natural selection.
- fifty50Lv 41 十年前
Races came about due to migration and mutation. People who headed north, for example, didn't need as much melanin. Unused genes tend to make way for more useful genes. Now that the world is overly populated and on the move more than ever, the races have more opportunity to intermingle, so they probably won't remain so distinct.
- 匿名1 十年前
the same way there are different types of trees, dogs, fish, beatles, cows, rodents, birds, elephants, tigers, lions, bears, moths, turtles etc etc etc any living species you can think of has different variations within it.
variations are due to genetic mutation largely because DNA replication is imperfect. different genes are also expressed in different way. ask yourself why siblings arent the same (aside from twins of course).
the whole "idea" of race is a labeling mechanism invented by man. biologically its argued that the term race shouldn't even apply to humans. think about, if two "races" of humans mix we just call their offspring "mixed race." In your own question you identify people by both color (black and white) and continent (asian) and act like these are actually set races of people like a form that you can fill out.
a reason that there are variations within groups is due to several factors including environment, migration patterns, and sexual preference. the first modern humans have been traced through mDNA to Africa where there were higher UV levels. Darker skin meant higher survivability because the increase in pigment protected the individual from various sun related skin disease. As man moved north where there were lower UV levels the advantage of darker skin diminished and other traits acquired through mutation proved more beneficial to survival. (shorter limbs are more favorable in colder climates because less body heat is wasted, whereas longer limbs are favored in higher temperatures to lower body heat).
Of course now the benefits of such things as color and height and hair have diminished with the invention of A/C, shelter, sunblock, umbrellas etc, but if you think back to early man fighting for survival not only against other men, but the environment itself its easier to comprehend.
Finally, just some questions for you. Why do you have an appendix and a tailbone? Why do human men have breasts? Why do whales have leg bones? Why are some people blind, deaf etc even though they clearly have eyes and ears? Do you believe that animals evolve just not humans? If you don't believe in animal evolution you should research fruit flies since even kids in elementary school are able to create a new species with little to no knowledge. If you think it is only humans who do not evolve then why is our DNA over 90% the same as a chimp?
- 1 十年前
I'm in between creationist and evolutionist I'm not really sure, but it is said that the asian culture became like that with the oriental eyes because the asian plains were very windy so over thousands of years this became an adaptation, and the africans have a darker skin color because of continuous exposure to the sun
- evirustheslayeLv 71 十年前
human races you mean? well the skin uses sunlight in the production of vitamin D, also the skin contains melenon(spelling?) which is like a natural sunblock but it tents the skin brown. the more melenon that less damage you get from sunlight but the less capable you are of making vitamin D, not that much of a problem near the equator but as you travel north or south the sunlight is so little that the melenon stats to be a problem, those with less will be healthier in that region as well as have lighter skin. we add vitamin D to our foods now, milk and bread to name two examples, we also use artificial sunblock so these differences don't really play out in the modern world any more.
- 匿名1 十年前
Natural selection plus genetic drift. People with paler skin in tropical areas don't have as many offspring as people with darker skin; cancer kills them off. (You can do the same thing in a tanning salon if you want.) People with darker skin in temperate to polar climates don't absorb enough UV light to produce vitamin D and tend to suffer from rickets, unless they have dietary sources. People with sharp features get chilled in cold desert areas and don't have as many offspring as the ones with more rounded features.
On a smaller scale, genetic traits with no particular selective pressure one way or the other may spread through small populations that are isolated from other populations. This can account for differences between Alpine, Nordic, and Mediterranean Caucasians. Google "founder effect" as well as "genetic drift".
- LeeLv 61 十年前
I'm not sure if I'm an Evolutionist, but I think their ideal would go like this:
Races come to place because people over the world have different environments, from weather, resources, animals, and so on, which shape a persons looks, included with natural genetics?
I don't know where I'm going... So just sh.........