Vivid Poly

15
Jul/10
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How to determine if parents eye color genes are recessive?

I've read about how some eye color genes are hypo.. or poly... or something like that? But how can you tell if you have a recessive or dominant eye color gene? My eyes are light blue with a darker rim. My mother's eyes are a shade of light blue-grey. My father's eyes are a green that is almost considered blue. And my brother's eyes are a blue-green. Now, just being a girl, I can't help thinking about marrying my crush in the future. His eyes are a vivid dark blue color. His mother's eyes are a blueish green shade I believe. His dad has blue grey eyes. His sister has green-blue eyes. And his brother has green-grey blue eyes.

Is there anyway to tell if the blue-eyed gene would be carried on IF we had kids...?

I just answered a question almost like this one a few hours ago about eye color, skin color, hair color and height; I'll just post the part about eye color here and give you a link to the other question for the rest.

Eye color is determined by three governing factors not just dominant and recessive genes a previously thought although this does play a significant role in determining a child’s eye color:

1.The parents eye colors
2.Whether the parents are homozygous or heterozygous for that color
3.If the parents genes for eye colors are dominant or recessive

In general, inheritance of eye color is considered "polygenic". That means that parent's genes usually (but not always) determine the baby's eye color.

Parents can carry both of the same gene (homozygous), or, what is more likely, they carry a more dominant gene, and another less dominant gene (heterozygous). It's usually impossible to determine whether a parent is heterozygous or homozygous. Brown and maybe green are considered dominant. But even two brown eyed individuals can make a blue-eyed baby, because this does not always completely follow the rules (it's therefore called "polygenic").

Read more at http://www.babymed.com/tools/eye-color-predictor?ktrack=kcplink

The genetics of eye color are complicated, and color is determined by multiple genes. Some of the eye-color genes include EYCL1 (a green/blue eye-color gene located on chromosome 19), EYCL2 (a brown eye-color gene) and EYCL3 (a brown/blue eye-color gene located on chromosome 15). The once-held view that blue eye color is a simple recessive trait has been shown to be incorrect. The genetics of eye color are so complex that almost any parent-child combination of eye colors can occur.

In human eyes, these variations in color are attributed to varying ratios of eumelanin produced by melanocytes in the iris.[2] The brightly colored eyes of many bird species are largely determined by other pigments, such as pteridines, purines, and carotenoids.

Three main elements within the iris contribute to its color: the melanin content of the iris pigment epithelium, the melanin content within the iris stroma, and the cellular density of the iris stroma.[7] In eyes of all colors, the iris pigment epithelium contains the black pigment, eumelanin.[2][7] Color variations among different irides are typically attributed to the melanin content within the iris stroma.[7] The density of cells within the stroma affects how much light is absorbed by the underlying pigment epithelium.[7] OCA2 gene polymorphism, close to proximal 5′ regulatory region, explains most human eye-color variation.

Read mores at: http://en.wikipedia.org/wiki/Eye_color

As far as on being more dominant the other, it impossible to say without a study but possibly you notice the brown hair and blue eyes more because you have brown hair and brown eyes. As I said, it would be impossible to say without a formal study.

Also see:

http://answers.yahoo.com/question/index?qid=20110605184924AARCdgu

EDIT***
Sorry, I didn't realize that was your question; however, it is imposssible to determine if the parents are homozygous, which means they carry the same gene or heterozygous, which means they carry a dominant gene and a recessive gene but it doesn't matter because this trait is is determined by three genes and is therefore "polygenic". The genetics of eye color are so complex that almost any parent-child combination of eye colors can occur.

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