Friday, September 1, 2017

Eyes Color

Human have different of eyes color, eyes color is a polygenic phenotypic character that determine by pigment that available on the eye’s iris. Human and animals also have different this kind of eye color, there are blue, brown, gray, green and may others.

Eye color is genetic that are complicated involve why the eye have certain of color. Usually blue color is determine by multiple genes. The genetics of eye color are so complex that almost any parent child combination of eye color can occur. Chromosome on this eye genetically is take from both of their parent chromosome that sometime create of new color combination.

There are different contain that causes a color on the eye, in human eyes, these variation in color are attributed to varying ratios of eumelanin that is produced by melanocytes in the iris. Animals eye have more vary of eyes color like in bird, brightly color are largely determined by other pigments, such as pteridines, purines, and carotenoids.

Color variations among different irides are typically attributed to the melanin content within the iris stroma. The density of cells within the stroma affects how much light is absorbed by the underlying pigment epithelium.

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