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Melanin Skin Color

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In class we talked about melanin and how it effected skin color and briefly discussed how it effected eye color. How if you did not have melanin to color your eyes they would appear red or pink because of your exposed blood vessels like in albinism. I found this information truly fascinating and wanted to learn more about how/why we have color variation, or even color at all, in our eyes. The first thing I found in my research is that the original eye color is brown somewhere presumably 6,000-10,000 years ago there was a genetic mutation in which two nucleotides were switched, an adenine and a guanine. This mutation turned off the eyes capability of making a brown eye color. It was a very simple mutation that could have been very different, …show more content…

What makes the colors so noticeably different is the amount of melanin in both layers some one who has a lot of melanin in both layers is going to have darker eyes, but the cool part is if someone has green or blue eyes they will have melanin in the epithelial layer but have absolutely nothing in the stroma. So you may be thinking to yourself okay so when you look through the epithelial layer you will find blue or green melanin, but you won't because melanin doesn’t color things with those colors. Melanin colors things in different variations of brown. So this is where it gets tricky, how do people have blue or green eyes if there is no color in the stroma and no blue or green in the epithelial layer of the iris? Well, they don’t. No one truly has blue or green eyes its an optical illusion! Everybody, every human, has brown eyes! Just because of the layer that the melanin is found on and how much melanin is being produced changes not the actual …show more content…

I found out that she does and I guess a lot of other celebrities do too like Kate Bosworth, Jane Seymour, and almost kinda David Bowie. He doesn't actually have heterochromia iridis but he got into a fight with a childhood friend which left one eye permanently dilated to that one size in that one eye so it kinda looked like it. But heterochromia iridis was not as rare as I had previously thought 6/1000 people have it but in most of those cases the variation in color is so slight its very hard to tell. You never know you could have it! Heterochromia iridis can be hereditary or can even be caused by disease or

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