is skin color related to the weather ?

Question

what i want to say , is afrecan people black skin becous the heat , and whith people color becuse of cold wither , if not why most of the high temperature countrys have black skin, and the cold countrys have whith color?

Answer 1

Human skin color can range from very dark to nearly colorless (appearing pinkish white due to the blood in the skin) in different people. Skin tone is determined by the amount and type of the pigment melanin in the skin. On average, women have slightly lighter skin than men.

In general, people with ancestors from sunny regions have darker skin than people with ancestors from regions with less sunlight. However, this is complicated by the fact that there are people with ancestors from both sunny and less sunny regions, and whose skin coloring may have any shade of the spectrum of possible tones. Sexual selection also plays a role
http://en.wikipedia.org/wiki/Human_skin_color

Answer 2

Well.... yes in that there is definitely a correlation between 'weather' and skin color, but it has little or nothing to do with temperature in terms of resulting in 'black', 'white' or some color in between; it's better correlated to sun exposure.

Melanin is a protein that protects from UV rays, it also happens to be a pigment. Even in one person, throughout their lifetime, skin will darken as a result of sun exposure. For people with fair skin, the sun may burn, blister, or even lead to skin cancer more easily.
In regions that get more sun, it is evolutionarily advantageous to have more melanin in the skin to prevent burning, blistering, and cancer.

One theory I've seen suggests that increased melanin in adults can trigger a change in the genes of their gametes (egg and sperm) to increase the number of genes coding for melanin (though I don't know by what mechanism). The baby, as a result, would be slightly darker, even negligibly so. The change, over generations, would be more noticeable. On the flip side of that, disuse of these genes as people migrated north would result in their lack of necessity, and subsequent disposure of the genes. This is a possible explanation for why we see a continuum of color with those who have darker skin in the south.

This is only a possible explanation for skin color, not race (which is caused more by genetic drift and geographic isolation than environmental factors).

Answer 3

yes, definalty at least evolutionary wise. There is a mountain that is named something like how you say caucasian. Whites are thought to have evolved from the mountain areas so that is why they are more prone to be "hairier" than african americans for example. The body uses the chill bumps as a reflex in attempts to warm the body. Another example could be how african americans have more melanin (found in i think the basal layer of skin). They need more melatonin to help with the hot desert sun. African americans are obviously thought to have evolved from the african/desert areas. Asians have smaller eyes or the slim eyes that look closed because of the wind that they have there, so there eyes have just evolved like that to accomadate to the atmosphere.

Answer 4

Good question!

yes it is
under our skin there r a layer of blood carrying nerves known as arteries and veins when the temperature is cold the nerves become some what constricted so as to conserve our body heat from loss this is known is VASO CONSTRICTION
hence one becomes pale in winter due to less end blood supply to the skin

Similarly when it is hot the nerves get dilated so as to loose heat to the surroundings this is known as VASO DILATION
hence a person looks BLUSHED(red end) when it is hot due to increased blood supply

Answer 5

It is mostly related to adaptation to the conditions. Skin color is caused by a pigment called melanin in the skin.

Answer 6

They say that different defenses against the sun have caused skin colors to adapt.

Answer 7

didnt really know what you were saying..like at all..but CHA CHING thanks for the two points
oh and white people,as in me, most likely turn pink during cold weather..if that has anything to do with your question

Answer 8

none of that make sense
but if you want to know go to google