Essay on Anatomy Case Study on the Evolution of Skin Color

1184 Words Oct 8th, 2012 5 Pages
The main cause of Skin Cancer is exposure to the sun. Caucasians are more at risk for skin cancer because people with Darker Skin are more evolved to black out the sun. The age that Skin cancer typically occurs is after 50. The incidence of skin cancer is greater in older individuals. The amount of light reaches the North and South Poles in a predictable manner. The map shows all one color near the poles. The latitude that receives the greatest amount of UV light is the equator. Based on this information, the darkest pigmentation of skin is along the equator. The lightest Pigmentation of skin is near the poles. The more darkly pigmented skin will be near the equator because there is more UV light there, and the pigment …show more content…
The effect of UV light on folate levels makes the count drop. Folate is linked to natural selection because the folates deplete from UV light exposure, which causes less births through miscarriages or birth defects. The skin tones related to higher folate levels are lighter skin tones. In my opinion, if someone lived in a region further from the equator and had no history of skin cancer, they would be able to have Children easier. Genetics, UV exposure, and folate levels all have to do with skin cancer and reproduction. A light skinned person living in the tropics, after a while, could have trouble reproducing. A light skinned person living in a polar region would most likely have no problems reproducing. A dark skinned person living in the tropics would most likely have no problems reproducing. A dark skinned person living in the polar region would most likely have no problems reproducing. At a polar latitude, the inhabitants would be lightly pigmented. Their folates would be high. In a tropical area, the inhabitants would most likely be darkly pigmented. They would have low folate levels. Darker skinned individuals are situated more near the equator and have less folates. The opposite goes for light skinned people. Vitamin D is linked to Natural selection because Vitamin D is essential for normal growth, calcium absorption,