How come we have different colored eyes?

Question

is there a logical reason?

Answer 1

It has to do with the amount of melanine your body produces.
Melanine is brown, and used in the colour of hair, eyes, but also skin. It's why people get a brown colour when they spend too much time in the sun. As a sort of protective coat. So it's also partly determined by evolution. Africans are more likely to have brown eyes than for instance, Europeans

Answer 2

Eye color is an inherited trait influenced by more than one gene and is determined primarily by the amount and type of pigments present in the eye's iris.
In eyes of all colors, the iris pigment epithelium contains the black pigment, eumelanin. Color variations among different irises are typically attributed to the melanin content within the iris stroma.
There are 3 true colors in the eyes that determine the outward appearance: brown, yellow, and gray. The color your eyes turn depends on how much of these colors are present. For example, green eyes have a lot of yellow and some brown, making them appear green. Blue eyes have a little yellow and little to no brown, making them appear blue. Gray eyes appear gray because they have a little yellow and no brown in them. Brown eyes appear brown because most of the eye contains the brown color. Brown is the most common, blue is second, and green is rarest.

Answer 3

As far as I know, eyes have just genetically developed different colors. Blue irises don't have special functions or real advantages over green or brown ones. It's just an example of a variation on the alleles in your genes.

Just assume that through the process of evolution, the genes mutated in the slightest to allow for the different colors.

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I was going off of just a random mutation process for the change, but it is true that natural selection could have allowed for the eye color change due to physical surroundings... I'm no expert on eyes.

Answer 4

its all biology. it depends on whether you have a dominant or recessive trait, homozygous or heterozygous.
if both your parents have blue eyes (homozygous dominant) that means the percentage the child will have blue eyes is 100%.
then if the parents have brown eyes, you dont really know if they carry a recessive trait. (you have to do the whole punnet square thing)
then there are other colors like light brown, dark brown, green, or yellowish. those are ALL shades of brown, and that i dont know how to tell if your child will have green eyes.
hope this helped :D , ask your biology teacher for more info

Answer 5

Many people have ancestors that came from places with cooler climates that don't get a lot of sunshine. Because of that, they don't need as much melanin in their skin and eyes to protect them from strong sunlight so their eyes became lighter.

Answer 6

all about genetics. if both parents have brown eyes and a baby comes with green eyes....could be that one parent had green eyes as a recessive trait (there but not physically seen because blue is more dominant.) just an example....so all about recessive and dominant traits you get from your parents....

Answer 7

Plain and simple its GENETICS, the information can be found in DNA strands.

Answer 8

each person had different genetic information that we receive from our parents.